Tap to unmute

Why is this PCIe Card RADIOACTIVE?

  • Published on May 29, 2023 veröffentlicht
  • Visit www.squarespace.com/LTT and use offer code LTT for 10% off
    Use code LINUS and get 25% off GlassWire at lmg.gg/glasswire
    By using an Atomic Clock the clocks between different computers can be synced to within a dozen nanoseconds, and with that performance can sky rocket.
    Check out the Open Compute Project: www.opencompute.org/
    Build your own Time Card: github.com/opencomputeproject...
    Buy a NVIDIA GeForce RTX 3090
    Amazon (PAID LINK): geni.us/IyMfbPW
    Best Buy (PAID LINK): geni.us/NiNjL
    Newegg (PAID LINK): geni.us/aRE7XJ
    Purchases made through some store links may provide some compensation to Linus Media Group.
    Discuss on the forum: linustechtips.com/topic/13677...
    ► GET MERCH: lttstore.com
    ► AFFILIATES, SPONSORS & REFERRALS: lmg.gg/sponsors
    ► PODCAST GEAR: lmg.gg/podcastgear
    ► SUPPORT US ON FLOATPLANE: www.floatplane.com/
    Twitter: linustech
    Facebook: LinusTech
    Instagram: linustech
    TikTok: www.tiktok.com/@linustech
    Twitch: www.twitch.tv/linustech
    Intro: Laszlo - Supernova
    Video Link: • [Electro] - Laszl...
    iTunes Download Link: itunes.apple.com/us/album/sup...
    Artist Link: soundcloud.com/laszlomusic
    Outro: Approaching Nirvana - Sugar High
    Video Link: • Sugar High - Appr...
    Listen on Spotify: spoti.fi/UxWkUw
    Artist Link: / approachingnirvana
    Intro animation by MBarek Abdelwassaa mbarek_abdel
    Monitor And Keyboard by vadimmihalkevich / CC BY 4.0 geni.us/PgGWp
    Mechanical RGB Keyboard by BigBrotherECE / CC BY 4.0 geni.us/mj6pHk4
    Mouse Gamer free Model By Oscar Creativo / CC BY 4.0 geni.us/Ps3XfE
    0:00 - Atomic Clock?!?
    1:05 - GlassWire
    1:15 - Intro
    1:25 - Highly precise timing
    2:05 - Test setup
    2:48 - NTP (Network Time Protocol)
    4:26 - TY Ahmad
    5:35 - Precision Time Protocol Enabled
    6:14 - Why precise timing matters
    9:15 - It is open source!
    9:24 - lttstore.com
    9:31 - Gaming implications
    10:31 - Fiber optic cables are cool
    11:55 - Security
    12:20 - Streaming
    12:40 - Again, it is open source
    13:20 - Squarespace!
    14:01 - Outro
  • Science & TechnologyScience & Technology

Comments • 3 787

  • Spirit
    Spirit Year ago +3283

    Just to clarify: The clock doesn't use rubidium's (minuscule and totally safe) radioactivity. It uses hyperfine transitions of the Rb atoms to stabilize an oscillator(clock).

    • mark1878
      mark1878 Year ago +211

      Careful. Linus doesn't do science.

    • Reuseful
      Reuseful Year ago +138

      So it's not really radioactive? Because that was weirdly unaddressed in the video

    • Algernon
      Algernon Year ago +240

      @Reuseful Yeah, I mean I don't really mind the clickbaiting with RADIOACTIVE in the title since it technically is I guess, but they should have at least clarified.

    • Tomasz Cheda
      Tomasz Cheda Year ago +164

      @Reuseful it is, but the radioactivity is not used, is is just a side effect of the element chosen as the clock's heart

    • Lord Winter
      Lord Winter Year ago +123

      @Reuseful Radioactive doesn't mean deadly. That's determined by the level of radioactivity.

  • Hedge Earthridge
    Hedge Earthridge Year ago +986

    Fun fact: the Atomic Clocks in GPS satellites are set to run very slightly faster(?) than the clocks on Earth. Because of Relativity (Gravity and Velocity) causing time to drift apart. If they didn't do that, GPS would lose several kilometers of accuracy every week!

    • maxhouseman
      maxhouseman Year ago +73

      That's true! At work I use rubidium clocks or our big GPS antenna on the roof to get the most precise 10 MHz pulse for my applications.

    • The Program
      The Program Year ago +109

      I was thinking about this fact when Linus was talking about clocks drifting. A clock may be accurate within its own frame of reference for a hundred million years, but relativity means a network still needs a good syncing system to account for warping of the space-time continuum. (And I *love* the rare opportunity to use that phrase with a straight face.)

    • S H O D A N //// 完璧な不滅のマシン
      S H O D A N //// 完璧な不滅のマシン Year ago +94

      @The Program Isn't it fucking wild that "I have to account for the distortion of the fabric of space-time caused by black holes" is a thing you can say about your work and be 100% honest about it? Literally a Star Trek engineer at this point

    • Diablo The Cheater
      Diablo The Cheater Year ago +68

      @S H O D A N //// 完璧な不滅のマシン No, no "I have to account for the distortion of the fabric of space-time caused by black holes" it is "I have to account for the distortion of the fabric of space-time caused by Earth" Gravity is a distorsion of space AND time, that includes Earth's gravity, the reason the gps have to adjust is Earth gravity mostly, since gravity is slightly different at surface and at orbit, time ticks slightly differently, it is very minuscule but in stuff like gps that need that level of preccision that slight difference adds up and is enough to mess with them.

    • The Program
      The Program Year ago +32

      @S H O D A N //// 完璧な不滅のマシン Well, not black holes, just relativistic time distortion due to motion and gravity. But yeah I LOVED writing that, felt like we live in the future at last.

  • Jeff Geerling
    Jeff Geerling Year ago +1574

    It's working on a Raspberry Pi! Hope to have a video about it soon. No problems cooling the itty bitty NIC on the Pi Compute Module 4 ;)

    • Hootesh Rambarassah
      Hootesh Rambarassah Year ago +85

      imagine jeff collaborating with Anthony. The crossover we didn’t know we needed.

    • James
      James Year ago +11

      @Jeff Geerling
      I was just thinking of you when I mentioned a pi array in my main thread comment!
      You have a great channel by the way, you really make me want to pick up a pi 4, and maybe do more with my current 3b lol

      LAMOND HAUGHTON Year ago +7

      So I am guessing you will be able to drastically increase your Pies clusters efficiency. Wonder if it will make supercomputer and parallel computing and application more accurate speeding up everything.
      I am waiting on the video.

    • Ventus Pri
      Ventus Pri Year ago

      Hy - Jeff its pcie so probably need only a driver but if I see the card gives out sinc clock signal so we can use that on gpio

    • Ventus Pri
      Ventus Pri Year ago

      but to more precise and we need speed ,Assembly lang to keep the program runin cycle to minimum.

  • Scope Toast
    Scope Toast Year ago +322

    I would like to see this implemented at LTT - even if the use cases are marginal at best, I think getting tech like this more exposure is super awesome.

  • MrRom92DAW
    MrRom92DAW Year ago +139

    People underestimate the power of accurately clocked hardware. It’s amazing how cheaply stuff was put together back in the day… take any two original SNES consoles. They won’t even run at the same speed.

    • Powerman
      Powerman 9 months ago +30

      Yeah and the speed of games was tied to cpu frequency back then. Meaning performance was slightly variable machine to machine lol. But not in a silicon lottery overclocking way.

    • Fi Re
      Fi Re 3 months ago +2

      You can still use a RC or 555 still today and live with like 20-30% you can still go for it.
      or you can use an rv-1805-ce or sth alike and go with less.
      It depends on what you want to achieve or how much bugdet you have

    • TallBoy
      TallBoy 3 months ago

      that would have massive implications for speedrunners where world records are claimed on timing differences of just one millisecond.

    • MrRom92DAW
      MrRom92DAW 3 months ago +6

      @TallBoy it probably *should* have implications for speedrunners. These consoles weren’t even clocked stably when they were new, let alone 30 years later. However that is the natural behavior of “original hardware” so I could understand that just being an accepted part of the deal when it comes to official speedrunning. Not all consoles are exactly identical, even when it comes to newer consoles.

  • Blackfish88
    Blackfish88 Year ago +65

    this made me very happy as a developer, like the techs cool but knowing that teams of the smartest people on the planets best solution was "just add 20ms" made me feel great

    • Fity Bux
      Fity Bux 3 months ago +2

      It was annoying to say there was a problem like that without even mentioning what software he's talking about. NoSQL DB? Some RDBMS? Replication conflicts? 😆 Nobody knows!

    • Ayaan K
      Ayaan K Month ago

      Makes me feel good about my janky solutions- I wonder how many janky stuff like this exists in distributed protocols 😂

    • Ceelvain
      Ceelvain Month ago

      The part you got wrong is "smartest people on the planets". If you've got a dev job you know how it works. You have a finite amount of time and need to push some code even if it's not perfect.

    • cmaxz
      cmaxz Month ago +1

      ​@Ayaan K lots of them, mostly are just bandaids solution.

    • cmaxz
      cmaxz Month ago

      ​@Fity Bux well, those that needs accuracy. Like basically any TCP connection that requires time precision like FPS games, massive data distribution, military equipments, etc.

  • Denny Dravis
    Denny Dravis Year ago +7121

    Slight correction: the rubidium clock has to be synced to GPS not because of drift, but due to special relativity.
    At the nanosecond resolution, traveling in an airliner at high altitude could theoretically cause the accuracy to drift.

  • NeroStrike
    NeroStrike Year ago +247

    Ahmad is a generous genius and I support his efforts. Bonus that Linus and co. think his stuff is cool too ;)

  • Ilkanar
    Ilkanar Year ago +261

    "we just whacked 20ms on everything"
    OKAY this is a good reminder that whole world is DIY and yolo in solutions that just work

    • The Vibe
      The Vibe Year ago +27

      am trucker. basically all commercial vehicles are just adult lego.

    • Felipe Gutierrez
      Felipe Gutierrez Year ago +12

      @The Vibe As a kid who plays, builds and works with sh!t like 3D printers, they are all just the most YOLO solutions ever. From code to hardware. These things are built from LED power supplies and the motors of old scanners. And to compensate for inaccuracy to print you will just plug in an "offset" values, from distance, to motor steps, to temperature. And they fail... even the best engineered hardware, code has had mindfucks where it does not know how to manage a high temp of a failing relay that just clicked open and just lets it rip (3D printer of a friend caught on fired thanks to the computer trying to click an unresponsive relay off instead of going to kill the power source).
      I think if it's programmed by humans, it has YOLO solutions all over it, that one day or another, will be fixed, or a catastrophe depending on what we are talking about.

    • Casey Daniels
      Casey Daniels Year ago +10

      Nothing is more permanent than a temporary solution that works.

    • Lunam
      Lunam Year ago +5

      This is why the Space shuttle had 4 flight control computers designed in the '60s synced up for redundancy and an additional independent fifth backup computer with software _written independently_ , just in case.
      The computers from the 60s were good enough and 'just worked' (a valuable attribute for spaceflight) but in case there was a hidden glitch in the software knocking out the main computers the backup would be very unlikely to have the same glitch.

  • Nick
    Nick  Year ago +80

    This is one of the coolest things I've seen in my entire life, this has me genuinely stoked for the future, just to see whatever practical implementations people come up with for this tech.

    • Greg Dawerson
      Greg Dawerson Year ago +1

      Open her up, get the rad stuff, make the glowy paint.

  • Matthew Day
    Matthew Day Year ago +48

    I was expecting an Isotope driven random number generator, for when you want things to be the opposite of precise

    • Marc-André Servant
      Marc-André Servant Year ago +9

      You don't need any radioactive substances for that, you can use thermal noise within the semiconductor die itself (as is done with Intel CPUs and RDRAND instruction). Adding radioactive isotopes under the heat spreader would be cheap to do but massively expensive in terms of regulatory compliance.

  • Cyberguy42
    Cyberguy42 Year ago +38

    I feel like they must have had a bad ntp configuration for that baseline example... I've used it (well, chrony) to synchronize computers for robotics work, and the time difference between them has never been close to that large.
    I believe you can also designate one local machine to serve as a time server for the rest of the network, then you should be able to synchronize to roughly within local lan latency.
    Obviously the atomic clock hardware will give much better results, I'm just saying that you can get much better than shown without it.

    • TXE1ND
      TXE1ND Year ago

      Wait huh

    • SuperQ
      SuperQ Year ago +11

      @TXE1ND The video is likely rigged to show poor NTP performance.
      Systems on a local network like this should be able to have sub-millisecond sync with normal off-the-shelf NTP.

  • Brad DL
    Brad DL Year ago +2964

    I love this type of content. Sometimes you really need to see what tech is beyond video production and gaming or seeing Linus tear his house apart.

    • Paolo Brambilla
      Paolo Brambilla Year ago +42

      I'm here for the Linus's home demolition.

    • Lilly Who
      Lilly Who Year ago +6

      _but it no make me pc go brrrrrr_

    • Robert Box
      Robert Box Year ago +5

      Is there a gaming vlog totally free of RGB LEDs? I'd be in.

    • Linux Streamer
      Linux Streamer Year ago +4

      penguins buzz off bot

  • Mark O
    Mark O Year ago +15

    I've gotta say... Linus is a seriously legit "computer geek". He knows his stuff. I remember hearing about this card a couple weeks ago, but I had no idea that it had such wide-ranging utility.

  • Thomas Gardner
    Thomas Gardner Year ago +7

    I'm currently working towards becoming a software engineer in my spare time, and stuff like this genuinely gets me to audibly exclaim 'fuck this is cool'. It makes me want to work harder and inspires me. Cheers LTT.

  • Joshua DeLaughter
    Joshua DeLaughter Year ago +62

    Linus: This PCIe card is radioactive!
    Also Linus: **tosses it on the counter**

    • Atis Basak
      Atis Basak Year ago +7

      Actually the card is not radioactive. Rubidium is not radioactive

    • Joshua DeLaughter
      Joshua DeLaughter Year ago +1

      @Atis Basak
      Yeah, I know. Just thought it was kinda funny.

    • NoeraZ H
      NoeraZ H Year ago +1

      @Atis Basak "Natural rubidium is radioactive, with specific activity of about 670 Bq/g, enough to significantly expose a photographic film in 110 days"

  • Jonathan Page
    Jonathan Page Year ago +27

    I would love to see an LMG office implementation to see a closer-to-real-world example of improvements.

    • astr0
      astr0 Year ago +2

      maybe they could implement it into their content creation pipeline to significantly lower time differences between channel super fun videos?

  • James Skaggs
    James Skaggs 3 months ago +2

    Super cool! I think this is how they beat the CAP Theorem, which was always super-depressing. My understanding of Google's Spanner database is that it uses an atomic clock to ensure Consistency and Atomicity, even when there is Partitioning. CAP Theorem: Pick 2 :-(

  • P24p1
    P24p1 Year ago +4033

    Upcoming Fallout games are gonna be interesting with real nuclear parts in your pc!

  • ChubAdmiral
    ChubAdmiral Year ago +4

    I had to deal with this recently. We had an API which allows users to retrieve audio files using a token, which is only valid between a set amount of time. The machine the API was on drifted about .5 of a second ahead of time. Which meant when the user took the token to Azure, they were rejected. As the token wasn't going to be enabled for another 10ms. But when the developer was trying to diagnose the problem, stepping through it slowly they couldn't see the issue. We resolved it by instead of generating the token between now and 10 mins in the future. We say between 1 minute ago and 10 in the future. Still though, dealing with databases, and correct information, especially over multiple sites globally, becomes difficult keeping everything in sync and that time stamp because less and less accurate when compared to other centers.

  • CodeRace
    CodeRace Year ago +17

    I would LOVE to see you guys do a "setting up our atomic clocks" video. It'd be cool.

  • El Mustachio
    El Mustachio Year ago +6

    This was a fantastic video. I really like videos like this that describe the limitations of technology and how technological developments reduce the limitations to drive capability improvements. Keep it up!

  • Pattychee
    Pattychee Year ago +4

    i love the amount of research that linus puts into these videos

  • stormman641
    stormman641 Year ago +2

    I would definitely buy one to try some different projects if they were cheaper. Games that have large asset counts and lots of physics going on for multiplayer seems like something that could really benefit from something like this.

  • Lawrence John Young
    Lawrence John Young Year ago +1114

    The fact that this was made open source is amazing, world changing stuff.

    • leonardsalt
      leonardsalt Year ago +21

      Yeah man, imagine framework laptop comes up with an atomic module for a laptop

    • Fotografieren mit MarcusFotos.de
      Fotografieren mit MarcusFotos.de Year ago +17

      i agree this ist some Volvo Seatbelt level move!

    • long pham
      long pham Year ago +5

      I don't think so. The design uses many exotic parts and is overly expensive. Generally it is called GPS Disciplined Oscillator (GPSDO), it has been implemented so many time that some people call their design "Yet another GPSDO".

    • Vincent
      Vincent Year ago +4

      ahmad big homie

    • Shawn Busker
      Shawn Busker Year ago +3

      It's more open hardware than open source in its current state.

  • engonzal
    engonzal Year ago +11

    This was awesome, I love deep dives about timings like this! I setup a GPS Raspberry Pi Timeserver a while back and it was a really fun project.

  • Waldiney Torres
    Waldiney Torres Year ago +18

    Now this is actual technological progress. Haven't seen one of those in years besides gimmicks, personally. Glad to witness this event.

  • The Program
    The Program Year ago +4

    Best LTT video in a long time. Very very cool, and I do hope you guys implement a network (even if the benefits are marginal, even if most of our software doesn't take advantage of the increased accuracy).

  • ehhhhhhhhhh
    ehhhhhhhhhh Year ago +2

    Gaming aside, I think this would even make regular web browsing feel much snappier. Very excited to see latency benchmarks.

  • Timothy King
    Timothy King Year ago +9

    I would absolutely love to watch a video about implementing this on the LTT office network.

  • Max Mustermann
    Max Mustermann Year ago +431

    It is actually really quite impressive that they managed to miniaturize atomic clocks to such a degree.

    • frecio231
      frecio231 Year ago +26

      When I was a kid I had this magazine that had a picture of an atomic clock, it was huge (I think bigger than my table) and now fits in my palm, just amazing

    • Test
      Test Year ago +22

      @frecio231 The National Air and Space Museum has a collection of atomic clock, from a huge metal chuck (50 years ago) to the size of an oscilloscope. Now it becomes even smaller while maintaining the ultra precision. Tech truly advances.

    • Jake1702
      Jake1702 Year ago +2

      The devs must've played a lot of Fallout.

    • Spirit
      Spirit Year ago +13

      @Test To be fair, those are still used. You're referring to cesium clocks, and they *are* more precise than these embedded Rb standards. They also have a finite lifetime, since they use a "spray" of Cs from one side of a tube to the other.

  • Izzy Hope Dolphin
    Izzy Hope Dolphin Year ago +1

    I wonder if a card like this would eventually be built into your standard cpus or motherboards eventually. Having a card like this is really cool but if its just in every computer it would effect basically everyone eventually without people having to know about this special card

  • RealLifeTech
    RealLifeTech Year ago +4

    I love these dives into the new frontiers of tech. Keep it up because it inspires so many people.

  • JakeAndBake
    JakeAndBake Year ago +2

    This episode was awesome, I like learning new things about computers and it's cool to see some new tech I wasn't already aware of after so many years of watching LTT

  • Mr H
    Mr H Year ago +1

    This could also be used to enhance the reliability of collaborative programs where you have multiple people making changes to the same file simultaneously.

  • The Program
    The Program Year ago

    Something this cool + open source? I was literally cringing at the thought of anybody from FB remoting into my computer, but this guy is legit doing some incredible work. Sparkfun had an atomic clock (cesium) for a while, but I didn't really see the point of having time that accurate until now. This is one of the best LTT videos in a very long time.

  • cyberspectre
    cyberspectre Year ago +1413

    "At $1,600, most gamers would buy a 3090 instead" 😂 keep giving them false hope, Linus

    • KKona
      KKona Year ago +60

      more like a scalped 3080 at those prices lol. I havent checkin this month but imsure 3090s are still 2k+

    • Nice Keyboard Alan
      Nice Keyboard Alan Year ago +7

      Wish my job would just let me get off work for a gpu lmaooo

  • K Peters
    K Peters Year ago +1

    How to build a computer gets a tad boring after a while, but this - underneath the hood / behind the scenes - stuff is very cool. How about a video on quantum computing - how it actually works compared to what we all use (memory, processor, etc). Keep it com’n.

  • Chris Monkman
    Chris Monkman Year ago +1

    It's fascinating to see how the costs have come down since the Atomic pocket watch back in 2013. I expect they'd have to get alot cheaper still to get wide spread acceptance though (possibly integrated into the NIC to avoid the pci-e overhead?)

  • Tech with Will Carter

    Id be REALLY curious to see if you could increase performance between the editing computers and the storage servers and the work-from-home editing computers by syncing them with this atomic clock.
    How much over head is being lost when accessing video files over the network? Any?

  • eXTCy
    eXTCy Year ago +5

    this is actually one of the few new tech innovations that im excited for.

  • LoPhatKao
    LoPhatKao Year ago

    this absolutely _needs_ to happen
    even if only for the ability to use the fiber optic networks as grav wave detectors

  • Yonguk Jung
    Yonguk Jung Year ago +901

    Jokes aside, this really is pretty cool. I feel like motherboards in the future will just ship with this feature built in

    • Theo Karlsson
      Theo Karlsson Year ago +28

      give this about a year or 2 and this will me implimented in m.2/ssd or even a new one

    • Stranger
      Stranger Year ago +63

      Doubt it as radioactive materials is a giant pita to handle. you have to label your shipment that it contains radioactive materials. certifications ? then it's gonna end up in the landfill eventually. this is just a bad bad bad idea.

    • yumri4
      yumri4 Year ago +4

      The feature is the supporting chip for the feature is not.

    • Jason Sherwood
      Jason Sherwood Year ago +7

      Motherboards, Phones! This is what is going to push communication standards well past 6G.

    • Stranger
      Stranger Year ago +4

      @yumri4 Oh no I meant specifically having it be part of the motherboard. As a separate module it could probably work.

  • Legitimate Theodora

    "Tell me if we get signal main screen turn on" has got to be quite the relic these days and I still appreciate it every time I hear it from you Linus.

  • Josh Pilla
    Josh Pilla Year ago

    This is highly impressive the applications are limitless i would go as far as loosely calling this "revolutionary" also the fact that its open source is excellent now things are getting interesting once again in the pc universe. I have a strong feeling this product could have strong applications for astrophysics its very exciting.

  • John A Citron
    John A Citron Year ago

    This is cool stuff!
    Back in the early 1990s, I worked for a life insurance company that had a time server. This '486 PC running Novell Netware, ran a proprietary program that issued time-stamps to all the clients on the network to ensure that the transactions were time stamped accordingly. The resolution was down to a tenth of a second.
    Imagine the work of this full-size '486 PC being done on a single PCI board now.

  • Rob Speed
    Rob Speed Year ago

    I don't even remember *why*, but I was recently researching the cost of atomic clocks and was surprised by how inexpensive they'd become. And what you're showing off is about half the price of what I found. This seems like one of those things that'll soon be cheap enough that it gets included in SOCs.

  • Solaris Firelyte
    Solaris Firelyte Year ago +770

    LTT has always been informative and funny, but this is actually legit one of the coolest video's I've watched in a while, I always knew about atomic clocks but the fact that they can be used in such World changing ways is mindblowing. I can't wait to see what this will bring in the future.

    • RandomUser
      RandomUser Year ago +2

      sure, it was explained very badly and left tons of open questions.

    • Amir
      Amir Year ago +1

      @RandomUser Sarcasm🤦‍♂️

    • RandomUser
      RandomUser Year ago

      @Amir no, just no

    • Alexander Maxx
      Alexander Maxx Year ago +15

      @RandomUser questions such as? :)

    • Frederick Hashbury
      Frederick Hashbury Year ago +11

      @RandomUser ok why don't you tell us what is lacking in the video? i'm sure the rest of it is up to viewers to research more, so again what is it?

  • Nícolas Nogueira
    Nícolas Nogueira Year ago +1

    I like those kind of videos, coll tech things that are fun to watch and learn about. Thanks LTT team, keep the awesome work!

  • Dominic Sevilla
    Dominic Sevilla Year ago

    Videos like theese are always so cool, i might not understand everything right away but just by how they are genuinely excited and interested in this tech and where it can do is just so incredible to see!

  • Ryan Schenk
    Ryan Schenk Year ago +3

    I was glad to see Ahmad in the video. His work is really important for the future of the internet and scientific discovery and he seems like a super good guy, too!

  • GreenProtagonist
    GreenProtagonist Year ago

    With 2 of these devices at LTT headquarters could you theoretically do data transfer measurements extremely accurately which would allow for very sophisticated network and data transfer benchmarks for high end equipment? Could you also combine this with uptime calculations to determine network health?

  • geekehUK
    geekehUK Year ago +3

    While this is very cool, it gives me some security concerns with regard to possible timing attacks on encryption protocols as well as deanonymisation of users on TOR or similar services.

  • Canicus
    Canicus Year ago +97

    This was a lot cooler than i was expecting. I wasn't aware how much impact more accurate clocks could have

    • Jean Roch
      Jean Roch Year ago +4

      Accurate time has been important since before electricity. Especially to sailors. Look it up. They are the reason we have had such complex timepieces for centuries.

  • renegade637
    renegade637 Year ago

    If this manages to go mainstream, I can think of a magnitude of uses beyond gaming.

  • wpgspecb
    wpgspecb Year ago

    In fact a delay was added to the algorithm 'THOR' made by Brad Katsuyama of RBC in the mid 2010's to combat the electronic front running that was happening because of the time/distance fragmentation between all the 44+ stock exchanges in the USA. This didn't always work, but they would delay the order to certain exchanges so they would all hit at the same time when they were purchasing large (like 100k +) share blocks that were split between different exchanges.
    When Brad left RBC to build his own stock exchange (Investors Exchange - IEX) they actually built a time delay for the entire market by adding a few hundred KM worth of extra fiber in a shoebox sized box that connected his server in the data center, to the main internet backbone. They achieved with hardware and they were doing with software. It equaled like 350ms or something but virtually removed the ability of HFT to front run that market.

  • Andrew Lonero
    Andrew Lonero Year ago

    That is really cool. I had no idea that atomic clocks just became orders of magnitude cheaper than they have ever been! Amazing! Crazy to think I could actually buy one...

  • Callum Dean
    Callum Dean Year ago +1

    One of the best videos from LTT! Incredibly interesting and easy to understand

  • LadrilloRojo
    LadrilloRojo Year ago +1

    This video is one of the best ones, super informative, funny and really cool. Didn't even feel 14minutes passed...

  • rayb3rt
    rayb3rt Year ago +328

    The clock needs gps to establish an initial timestamp with subsecond accuracy which is why gps is needed. The rubidium just provides significantly slow drift and gives holdover stability when there's loss of gps. Cheaper OXCOs can be used if a gps input is always available.

    • Kavorka Designs
      Kavorka Designs Year ago +9

      "Cesium Atomic Clock" ;)

    • Dusty the Fuzzy Dragon
      Dusty the Fuzzy Dragon Year ago +9

      If you always have GPS input and just want accurate time, ntpd on a Raspberry Pi with a GPS hat can get an offset of around 10 microseconds after running about an hour.

    • TrimeshSZ
      TrimeshSZ Year ago +4

      @Kavorka Designs It's a bit confusing though - normally when you talk about a cesium clock people will think of a cesium beam device like the HP5071 - this is a bit different, it operates on the same principle as a rubidium clock, just using cesium. The performance is still excellent, just inferior to a cesium beam - but it makes up for that by far lower power consumption and physical size.

    • porklaser
      porklaser Year ago +1

      It's a pretty reasonable price for a new frequency standard, receiver, etc all packaged on to a card as a ready-to-go solution. (You can see the standard is a off the shelf module it's just sitting there on the card) Prices have come down a lot! These things used to cost 10x the price not that long ago. Yeah you can DIY it for much cheaper with a salvaged standard off ebay but for new this isn't bad.

  • Shawn Elliott
    Shawn Elliott Year ago +1

    Radioisotopes are also useful for generating truly random numbers for encryption keys.

  • Thanny
    Thanny Year ago

    I'm interested in this concept just to keep servers in normal sync. NIST keeps changing the host names of their servers, so my scripts periodically break. And NTP servers are shockingly unreliable (crashing, failing to run, etc.).

  • Shaun
    Shaun Year ago

    Very cool. I hadn't thought much about super accurate timing before this. Interesting to think of the implications it could have for manufacturing... Even home 3D printing....

    • Jo-Erlend Schinstad
      Jo-Erlend Schinstad Year ago

      How could it afffect 3d printing?

    • Shaun
      Shaun Year ago

      @Jo-Erlend Schinstad It would not be as big of a deal as for a factory floor that is coordinating lots of systems, but home 3d printers can easily spend many hours on a project. RTC chips commonly have some drift which varies depending multiple factors like temperature. It would probably be fairly negligible, but perhaps consistency would be a bit better on long jobs or projects that start and stop. It is just an uneducated guess... 😅

  • Dane Artis
    Dane Artis Year ago +1

    Use it in your house to speed up home automation handling. Could probably make it almost instantaneous rather than having a delay

  • Mitch Nonya
    Mitch Nonya Year ago

    If this can drastically reduce latency over long distance communication, I would love to see a video using a game streaming service like GeForce now combined with this technology.

  • Reid H
    Reid H Year ago +342

    Linus: Gets nanosecond accurate timing.
    Also Linus: We're still late for the WAN Show.

    • ok
      ok Year ago +1


    • jmelchiori85
      jmelchiori85 Year ago +1

      They also only demonstrated microsecond accurate timing...

    • Daniel Jensen
      Daniel Jensen Year ago +4

      @jmelchiori85 They kinda skimmed past it, but it looked like their two computers were synched to at least 10-100 ns, with a fixed microsecond level offset from true GPS time.

    • Peter Müller
      Peter Müller Year ago +2

      Well, that's the difference between precision and accuracy ;)

  • Jim Bronson
    Jim Bronson Year ago

    IBM used to do the same. Everything in IBM UNIX or mainframes were sychronis synchronized to a central clock. Asyncronus used to be better and for many applications it is. But you can use both and eliminate interrupt delays and network collisions etc..

  • Unacceptable Minority

    This is gonna be so awesome with game servers when implemented.

  • S Schmachtel
    S Schmachtel Year ago +1

    This video's content clearly falls into WHAT?!! category. Extremely cool stuff. And clearly one that you might actually not really now yet when this can be important. Using underwater cables to detect gravitational waves sounds like one of those very surprising applications. Use data that is in principle available for almost no additional costs

  • nikkytae
    nikkytae Year ago

    what happens if you normalize this to be built into every motherboard? would be interesting.

  • therealchaos19
    therealchaos19 Year ago +1

    This would be great for your minecraft server. Since I am from Germany and my ping is around 106 I'd be very curious how much performance could be gotten from this device. But did I understand right? I also have to have this device installed in order to benefit from boosts or is it compatible with standard timings?

  • lol-i-youtube
    lol-i-youtube Year ago +616

    When Linus watercools this thing, it will require a stack and some graphite rods

  • Swims-In-Money
    Swims-In-Money Year ago

    I absolutely love this kind of content. Very interesting and exciting

  • Renan Lira
    Renan Lira Year ago

    This is the kind of content I like to see on Linus TECH tips. Not just overpowered PCs.

  • Jan Koppe
    Jan Koppe Year ago

    PTP has been used for quite some time in Audio over IP standards, like Dante, AVB, AES67, etc. :)

  • Abhinav Mehrotra
    Abhinav Mehrotra Year ago

    Hi Linus team. A new video idea, how many routers and wifi networks would it take to make every wifi unusable due to interference?

  • CastleHill
    CastleHill Year ago +1

    This same concept is used when slaving a bunch of A/D audio devices (analog digital audio conversion) into one dedicated system. I don't think rubidium is used (in fact I am sure of it, 99% of most prosumer and consumer interfaces use quartz crystal like a wristwatch/clock).
    But being able to say that "my 256 channels of AD is clocked with rubidium" would be pretty neat lol

  • menno duk
    menno duk Year ago +286

    Please implement this. This can only give great results: a faster network and/ or a very entertaining series. And it isn't as expensive as a gold controller 😉

    • Nav B0T
      Nav B0T Year ago +11

      *Yvonne didn't like that*

    • Nilaksh
      Nilaksh Year ago +9

      @Nav B0T I think Yvonne is still convinced he'll sell it someday. Living in denial I think :D

    • xxcr4ckzzxx
      xxcr4ckzzxx Year ago +2

      +1 I want to see that! Much more Interesting than a Gold Controller.

    • Nav B0T
      Nav B0T Year ago +2

      @Nilaksh scars of the past for her
      Future memories for Linus

    • James Halliday
      James Halliday Year ago

      But I also liked the gold controller.
      The latest incremental release of a gaming laptop.. I can give that a miss.

  • SuperSpecies
    SuperSpecies Year ago

    To be precise, submarine fibre optic cables no longer use repeaters, as in, a conversion from optical to electrical to optical signals.
    They use Erbium Doped Fibre Amplifiers (EDFAs), which are a pure optical to optical amplification technique (powered by pump lasers at different wavelengths, which are powered by electricity).
    As to whether these still fail I'm not sure, they are usually dual redundant pump lasers and they are built with a 25 year lifespan.

  • tds99
    tds99 Year ago

    I enjoyed this, sounded a lot more like one of my computer science classes than the average hardware enjoyer

  • BURD
    BURD Year ago

    Is there scope for this to be integrated into every motherboard natively?
    Gamers would be happy to install it into a spare M.2 but it seems pretty fundamental to general computer infastructure in the future!

  • jwo7777777
    jwo7777777 Year ago

    Seems this would be useful for database replication in a situation where large amounts of data change rapidly.

  • taith2
    taith2 Year ago

    Would be nice to see that replacing default quartz clock on motherboards.
    First models would probably find their way on servers of course, freeing PCIe slot

  • Travis Stoker
    Travis Stoker Year ago +24

    This is really neat! I am a touring audio engineer and we kind of deal with the same thing with our systems and syncing digital audio between multiple stations and even the PA systems. We use Word Clocks that use Atomic clocks similar to these cards. Having multiple stations that are processing the same source in real time need an external clock source to reference to rather than referencing back to there own processed internal clock source. Trying to have these stations process and reference this internally rather than syncing from a external word clock can create phase relation issues and even complete audio dropouts and very bad noises from a digital source. Latency is everything in the world of live audio.

    • SD MA
      SD MA Year ago

      Why? An atomic word ckock is just not needed. Antelope is really the only one and I have never seen anyone use it. Any digital audio system i have seen generally uses a master clock such as a consoles internal clock or Dante card for example.

    • Travis Stoker
      Travis Stoker Year ago

      @SD MA it is absolutely needed for the application I am using it for. Yes, all digital consoles have their own internal clock source, and yes you can clock from other external protocols like Dante and even have those protocols clock from your consoles internal clock. I use external word clocks because I am dealing with systems that have multiple consoles, playback sources, and outputs all over AVB and AES that needs to see the same clock source. Especially with dealing with multiple protocols like Dante, Madi, AVB, etc. Many audio engineers use external clocks in the concert touring world because of similar challenges like this. I actually use antelope word clocks like the ocx or isochrone trinity because of how many 75ohm bnc outputs they have. It all depends on the application and budget.

  • Pexoto
    Pexoto Year ago

    Fun fact: it is also actually very useful in robotics, in what we call RTOS, or Real Time Operating Systems. These, sometimes, need to be so precise in time, that every single and i do mean every little clock, need to be taken into consideration. For instance, CoBots (colaborative robots) are robots that can share the same working space as that of a human (common robots can't, since sometimes, they can actually crush humann bones as if they were rotten bananas). To do that they need very precise sensor arrays and data processing to estimate just where the dumbass human is, so that the little dumbass human dont get in the way of the mighty bot (like id do often because i seem to always hit everything in my way accidebtally) and get their puny weak weak jelly pathetic skull smashed

  • Harsh Koranne
    Harsh Koranne Year ago +7

    This should've been a part of my computer engineering syllabus.

  • AppliedCryogenics
    AppliedCryogenics 2 months ago +1

    Something doesn't smell right about the claim of 100X speedup just by having super accurate time synchronization. That clock still needs a distribution network, subject to the same signal propagation delays it is meant to compensate for. Still, it's definitely interesting to think about!

  • Michael Mellor
    Michael Mellor Year ago

    So could you use this theoretically to run house in sync instead of the typical master and slave config. If they were all the same clock timing guaranteed basically wouldn't splitting the work between them become super easy?

  • John Gangemi
    John Gangemi Year ago +1

    These have been around for years but the atomic oscillator, drive and time circuits are the most expensive parts and calibration is very expensive.
    PTP has been a game changer for synchronising clocks over communication networks.
    These clocks are so precise even relativistic effects have to be taken into account such as GPS and other satellites.
    Great video.

  • DesolatorMagic
    DesolatorMagic Year ago +88

    Y'all gotta show off one of those photon quantum mirror splitter "true random" PCI-E cards. They're SO COOL and very underappreciated.

  • xpyr
    xpyr Year ago

    Ahmad rocks! I had no idea why time accuracy is needed on such a small scale.

  • Eskieguy
    Eskieguy Month ago

    We did something along these lines at work to enhance network security. One computer acted as the time standard, and communicated with the Bureau of Standards, and all the other computers that needed access got their time from that one. That way if a computer tried to access our system, but had a wrong time stamp it would be rejected.

  • James Axelrad
    James Axelrad Year ago

    i worked with a passive satellite receiver in the Navy that had a time card the size of an ITX motherboard and had an accuracy of 1 second every 1000 years. it was 90s technology and was set by hand.
    this is the size of a sound blaster and is at least a couple of orders of magnitude more accurate and can keep track of its own time.
    that is absolutely amazing.

  • FODB-Database
    FODB-Database Year ago

    I wonder if this technology could be used to optimize the communications between Graphic card, cpu, ram, and drive...

  • Christian Bateman

    This is so cool just for using a oscilloscope. I am a automotive technician and use a oscilloscope everyday. Love my pico scope... great video

  • Scooty
    Scooty 2 months ago +1

    Linus: "There really isn't much in the way of this gaining widespread support."
    Also Linus: "Why is this card RADIOACTIVE!?!?"
    Also Linus: "Are we really gonna do that? Yeah, I'm not sure about that..."

  • blech71
    blech71 Year ago +94

    This technology has huge implications and potential benefits to telemetry from multiple sources that are all time sync’d.
    We’ve been looking for this for quite some time…. No pun intended.

  • Indie Mercenary Productions

    This is a huge deal. We're on our way to a world without lag 🙌

  • Fotografieren mit MarcusFotos.de

    I just wanted to say that i like that ltt is covering topics that only remotely aply to the average user as of today but may be groundbreaking in the future

  • Connor Vine
    Connor Vine Year ago +2

    Ya know. Living 30 minutes away from LIGO and hearing you mention it so many times in this video made me really happy. I have like 5 friends that work at the LIGO station. The things they're doing there is awesome.