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posted by n1 on Thursday June 22 2017, @08:09AM   Printer-friendly
from the epyc-to-ynfynyty dept.

AMD has launched its Ryzen-based take on x86 server processors to compete with Intel's Xeon CPUs. All of the Epyc 7000-series CPUs support 128 PCIe 3.0 lanes and 8 channels (2 DIMMs per channel) of DDR4-2666 DRAM:

A few weeks ago AMD announced the naming of the new line of enterprise-class processors, called EPYC, and today marks the official launch with configurations up to 32 cores and 64 threads per processor. We also got an insight into several features of the design, including the AMD Infinity Fabric.

Today's announcement of the AMD EPYC product line sees the launch of the top four CPUs, focused primarily at dual socket systems. The full EPYC stack will contain twelve processors, with three for single socket environments, with the rest of the stack being made available at the end of July. It is worth taking a few minutes to look at how these processors look under the hood.

On the package are four silicon dies, each one containing the same 8-core silicon we saw in the AMD Ryzen processors. Each silicon die has two core complexes, each of four cores, and supports two memory channels, giving a total maximum of 32 cores and 8 memory channels on an EPYC processor. The dies are connected by AMD's newest interconnect, the Infinity Fabric, which plays a key role not only in die-to-die communication but also processor-to-processor communication and within AMD's new Vega graphics. AMD designed the Infinity Fabric to be modular and scalable in order to support large GPUs and CPUs in the roadmap going forward, and states that within a single package the fabric is overprovisioned to minimize any issues with non-NUMA aware software (more on this later).

With a total of 8 memory channels, and support for 2 DIMMs per channel, AMD is quoting a 2TB per socket maximum memory support, scaling up to 4TB per system in a dual processor system. Each CPU will support 128 PCIe 3.0 lanes, suitable for six GPUs with full bandwidth support (plus IO) or up to 32 NVMe drives for storage. All the PCIe lanes can be used for IO devices, such as SATA drives or network ports, or as Infinity Fabric connections to other devices. There are also 4 IO hubs per processor for additional storage support.

AMD's slides at Ars Technica.


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  • (Score: 2, Insightful) by EEMac on Thursday June 22 2017, @10:20AM (2 children)

    by EEMac (6423) on Thursday June 22 2017, @10:20AM (#529446)

    This is what a clear and understandable product launch looks like. All the CPUs have basically the same capabilities. Varying speeds and core counts relates to TDP. Nice!

    • (Score: 3, Informative) by The Mighty Buzzard on Thursday June 22 2017, @11:38AM

      Indeed. The new Intel lineup is a proper clusterfuck by comparison. No, not even by comparison. It's just a proper clusterfuck.

      --
      My rights don't end where your fear begins.
    • (Score: 1, Flamebait) by fishybell on Thursday June 22 2017, @03:29PM

      by fishybell (3156) on Thursday June 22 2017, @03:29PM (#529528)

      This is what a clear and understandable product launch looks like

      I don't know. It seems like they may be targeting 16 year old me, rather than dealing with business realities me.

      Going BIG and Attacking The Market: All The Cores, Please

  • (Score: 1, Troll) by The Mighty Buzzard on Thursday June 22 2017, @10:26AM (12 children)

    What the shit? What's the big idea of building a CPU that badass, guys? I mean I couldn't figure out how to make it sweat in a gaming rig if I had an unlimited budget and that's always been half the fun of server chips.

    --
    My rights don't end where your fear begins.
    • (Score: 2) by takyon on Thursday June 22 2017, @11:21AM (10 children)

      by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Thursday June 22 2017, @11:21AM (#529461) Journal

      Games are going to be slow to adapt to beyond quad-core, but the major consoles now have 8 cores (~6-8 usable threads), AMD has made the (true) octo-core cheap, and Intel will introduce a mainstream 6-core chip in 2018 (Coffee Lake).

      If you need highly threaded software that will tax your 10, 12, 14, 16, 18, or 32 core CPU, I'm sure someone out there has compiled a list.

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      [SIG] 10/28/2017: Soylent Upgrade v14 [soylentnews.org]
      • (Score: 2) by The Mighty Buzzard on Thursday June 22 2017, @11:35AM (3 children)

        Right but half the fun of server chips existing was imagining what a badass gaming rig you could build with one. AMD screwed us on that.

        --
        My rights don't end where your fear begins.
      • (Score: 4, Interesting) by EvilSS on Thursday June 22 2017, @03:00PM

        by EvilSS (1456) Subscriber Badge on Thursday June 22 2017, @03:00PM (#529516)
        DX12 and Vulkan are going to drive this as they get fully adopted. Both make it much easier to write games that can take advantage of all the available cores on a PC. So it's a really good time for AMD to step back up and starting driving a new core war with Intel.
      • (Score: 2) by fyngyrz on Thursday June 22 2017, @06:03PM (4 children)

        by fyngyrz (6567) on Thursday June 22 2017, @06:03PM (#529605) Journal

        I write multi-threaded software. My SDR (Software Defined Radio) is currently using 33 threads during SSB (Single SideBand) reception and can use more if certain signal processing options are selected or when receiving wideband FM; my image processing software, on the other hand, determines how many cores there are, and then splits the images into bands (or in a few cases, regions) for processing so unless you've got a CPU with more cores than the image has scan lines, there are cases where they'd be tasked unless you tell the software to specifically limit how many cores it will use (which you can do.)

        The real problem for multi-core computing isn't how many cores: The problem is memory bandwidth. Eventually, you get no significant gains because "waiting on memory" dominates over "waiting on instruction cycles."

        Eventually, unless the memory bandwidth problem is solved, adding more cores is going to start looking like the "more megapixels" nonsense with the tiny phone sensors. Yeah, you'll have 'em... but they aren't doing you much, if any, good.

        • (Score: 2) by bob_super on Thursday June 22 2017, @07:39PM (2 children)

          by bob_super (1357) on Thursday June 22 2017, @07:39PM (#529629)

          I've said multiple times that my compiles will take at least 8 cores (come on guys, push those tools to 16 now!), and swallow all the DDR bandwidth I can throw at them.
          Reasonably-priced 8-channel DDR4? I need a mop before someone slips on the drool puddle.

          • (Score: 0) by Anonymous Coward on Thursday June 22 2017, @07:46PM (1 child)

            by Anonymous Coward on Thursday June 22 2017, @07:46PM (#529633)

            RTFM [gnu.org] :-)

            • (Score: 2) by bob_super on Thursday June 22 2017, @08:14PM

              by bob_super (1357) on Thursday June 22 2017, @08:14PM (#529643)

              Sadly, there's no open version for my tools. Compiling HW is very specific.

        • (Score: 2) by takyon on Thursday June 22 2017, @10:41PM

          by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Thursday June 22 2017, @10:41PM (#529689) Journal

          AMD is rumored [wccftech.com] to be adding High Bandwidth Memory to certain CPU/APU models. Intel has added HBM to Xeon Phi which has over 70 cores. However, stacking memory onto the CPU can cause thermal problems and is expensive. It remains to be seen how widespread HBM will be with CPUs.

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    • (Score: 2) by tibman on Thursday June 22 2017, @07:45PM

      by tibman (134) Subscriber Badge on Thursday June 22 2017, @07:45PM (#529631)

      The big "gamer thing" now is streaming + gaming. Encoding video and broadcasting it at the same resolution you're playing at is pretty CPU intensive. On top of that your social gamer stuff like discord (or mumble, teamspeak, ventrilo). A quad could probably do it. But a six (or eight) would be ideal.

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  • (Score: 4, Informative) by Alphatool on Thursday June 22 2017, @11:31AM (2 children)

    by Alphatool (1145) on Thursday June 22 2017, @11:31AM (#529463)

    The new security features [amd.com] on these chips are really interesting too. In particular, the secure memory encryption (making physical attacks on a machine much harder) and secure encrypted virtualization (allowing memory access for virtual machines without the hypervisor being able to read it) will be a big step forward in some environments. It's not perfect, but it's much better than the current alternative, which is nothing.

    There is one massive asterisk next to this though - it's fully dependent on a closed source ARM micro controller built into the chip. If there is a vulnerability or a back door in that then it's game over. How much do you trust AMD?

    • (Score: 2, Insightful) by The Mighty Buzzard on Thursday June 22 2017, @11:37AM

      About as much as I trust Intel. Which is to say I'm fairly certain they've long since handed the NSA the keys to the kingdom and if not they will be doing so soon.

      --
      My rights don't end where your fear begins.
    • (Score: 3, Insightful) by iwoloschin on Thursday June 22 2017, @07:59PM

      by iwoloschin (3863) on Thursday June 22 2017, @07:59PM (#529637)

      If AMD is paying any attention they'll let big customers review the ARM µC's source code under NDA.

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