Wednesday, November 07

Geek

Daily News Stuff 7 November 2018

Tech News

  • AMD had their big Next Horizon party, and it looks like the leaks had things pretty much correct.   (AnandTech)

    • Zen 2 has twice the floating point performance of Zen 1 (2 x 256-bit vector units, the same as Intel).

    • Updated from PCIe 3.0 to 4.0 for double the I/O bandwidth.

    • Infinity Fabric has been given a boost too, though not clear exactly how much.  If the Zen 2 chips have PCIe 4.0 then they already support at least 16 Gbps serdes where Zen 1 only goes up to 12 Gbps.

    • EPYC 2 (a.k.a Rome) has 8 CPU chiplets surrounding a memory and I/O controller core.  64 cores total.

      EPYC 1 (a.k.a Naples) has 4 Ryzen chips with Infinity Fabric links between them, but that would have gotten complex with 8 chiplets on the package.  Naples has 12 IF links on board to cross-connect everything; Rome needs only 8 links for twice the number of cores.

      https://ai.mee.nu/images/Epyc1vs2.png?size=640x&q=95
      Naples (left) and Rome (right).  Fingers on the right hand side probably belong to AMD CEO Lisa Su.


      The big chips on the left each contain 8 cores, 16MB cache, and Infinity Fabric, DDR4, and PCIe controllers.

      The little chips on the right each contain 8 cores, 32MB of cache, and Infinity Fabric, but all the DDR4 and PCIe channels have been moved to the big chip in the middle.

      [Had some stuff on die sizes here before, but the information I have is unofficial and contradictory, so I snipped it.]

    • Single-socket Rome server can outperform a top-of-the-line dual-socket Intel Xeon Platinum system.

    • No announcement yet of how this affects the Ryzen 3000 series, but this is a clear upgrade for third-generation Threadripper.

    • Zen 2 is sampling now and will be available next year.  Zen 3 is on track for delivery in 2020, and design for Zen 4 is under way. 


  • AMD also announced their new Radeon Instinct server GPUs.  (Anandtech)

  • AWS now offers AMD-based instances.  (AnandTech)

    Another significant win for AMD.

  • Want to run Linux on your shiny new Mac?  Haha fuck you.  (Phoronix)

  • VirtualBox turns out not to be leakproof.  (Bleeping Computer)

    It's not used much in server environments, but if you use it for testing untrusted code in secure sandboxes, you might want to not do that for a little while.  Like, knowing Oracle, eighteen months or so.



Video of the Day





Picture of the Day

https://ai.mee.nu/images/MulberrySt1900.jpg?size=720x&q=95

Photochrom of Mulberry St, New York, 1900

Click to embiggen.

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Apple pies are delicious. But never mind apple pies. What colour is a green orange?




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