96 pointsby zdw5 hours ago5 comments
  • elric10 minutes ago
    At 1:11 in the video, there's a chart of the TDP (which I looked for in the text but couldn't find). At 125-500W, these things run very hot.
  • mistyvalesan hour ago
    Here I am running a 12 year old Dell PowerEdge with dual Xeons.. I wonder when the first gen Epyc servers will be cheap fodder on eBay.
    • assusdanan hour ago
      IMO, 1st gen Epyc is not any good, given that 2nd gen exists, is more popular and is cheap enough (I actually have epyc 7302 and MZ31-AR0 motherboard as homelab). Too low performance per core and NUMA things, plus worse node (2nd gen compute is 7nm TSMC)
    • renewiltord19 minutes ago
      Not worth. Get 9654 on eBay for $2k plus $1k for mobo. $7k full system. Or go Epyc 7282 type, and that’s good combo easily available.
  • dragontamer3 hours ago
    ChipsAndCheese is one of the few new tech publications that really knows what they are talking about, especially with these deep dive benchmarks.

    With the loss of Anandtech, TechReport, HardCOP and other old technical sites, I'm glad to see a new publisher who can keep up with the older style stuff.

    • mongolan hour ago
      Interestingly, Slashdot originated from a site called "Chips & Dips". Similiar inspiration?
  • jeffbee2 hours ago
    The part with only 16 cores but 512MB L3 cache ... that must be for some specific workload.
    • phonon2 hours ago
      Oracle can charge $40-$100k+ for EE including options per core (times .5)...and some workloads are very cache sensitive. So a high cache, high bandwidth, high frequency, high memory capacity 16 core CPU[1] (x2 socket) might be the best bang for their buck for that million dollar+ license.

      [1] https://www.amd.com/en/products/processors/server/epyc/9005-...

    • addaon2 hours ago
      Does anyone know if modern AMD chips allow mapping the L3 cache and using it as TCM instead of cache? I know older non-X86 processors supported this (and often booted into that mode so that the memory controllers could be brought up), but not sure if it's possible today. If so, that would sure make for some interesting embedded use cases for a large DRAM-less system...
  • bitwize4 hours ago
    > Apparently we now think 64 cores is ‘lower core count’. What a world we live in.

    64 cores is a high-end gaming rig. Civilization VII won't run smoothly on less than 16.

    • zamadatix2 hours ago
      Civ 6 really doesn't utilize cores as much as one would think. I mean it'll spread the load across a lot of threads, sure, but it never seems to actually... use them much? E.g. I just ran the Gathering Storm expansion AI benchmark (late game map completely full of civs and units - basically worst case for CPU requirements and best case for eating up the multicore performance) on a 7950X 16 core CPU and it rarely peaked over 30% utilization, often averaging ~25%. 30% utilization means a 6 core part (barring frequency/cache differences) should be able to eat that at 80% load.

      https://i.imgur.com/YlJFu4s.png

      Whether the bottleneck is memory bandwidth (2x6000 MHz), unoptimized locking, small batch sizes, or something else it doesn't seem to be related to core count. It's also not waiting on the GPU much here, the 4090 is seeing even less utilization than the CPU. Hopefully utilization actually scales better with 7, not just splits up a lot.

      • lukeschlather2 hours ago
        > 16 core CPU and it rarely peaked over 30% utilization, often averaging ~25%. 30% utilization means a 6 core part (barring frequency/cache differences) should be able to eat that at 80% load.

        As a rule I wouldn't be surprised if 90% of the stuff Civ 6 is doing can't be parallelized at all, but then for that remaining 10% you get a 16x speedup with 16 cores. And they're underutilized on average but there are bursts where you get a measurable speedup from having 16 cores, and that speedup is strictly linear with the number of cores. 6 cores means that remaining 10% will be less than half as fast vs. having 16 cores. And this is consistent with observing 30% CPU usage I think.

        • colechristensenan hour ago
          My rule is more like I’d be willing to bet even odds that this could be sped up 100x with the right programmers focused on performance. When you lack expertise and things work “well enough” that’s what you get. Same for games or enterprise software.
    • snvzz22 minutes ago
      civ6's slowness is purely bad programming. No excuses to be had.
    • fulafel38 minutes ago
      As the GPGPU scene trajectory seems dismal[1] for the foreseeable future wrt the DX, this seems like the best hope.

      [1] Fragmentation, at best C++ dialects, no practical compiler tech to transparently GPU offload, etc

    • csomaran hour ago
      If Civ 6 is any guidance, 64 or 32 won't make a slight difference. The next step calculations seem to run on a single CPU and thus having more CPUs is not going to change a thing. This is a software problem; they need to distribute the calculation over several CPUs.
    • gkhartman2 hours ago
      I can't help but think that this sounds more like a failure to optimize at the software level rather than a reasonable hardware limitation.
      • cubefox2 hours ago
        That's the usual case when vid3o g4mes are "CPU limited". One has to just look whether the game does anything high-level that other games didn't do 10 years ago. Reasonable hardware limitations related to the CPU have normally to do with complex physics effects or unusually large crowds of NPCs. (Many games are CPU limited even for fairly small crowds because their engine isn't optimized for that purpose.)
        • deaddodo20 minutes ago
          > vid3o g4mes

          Why do you type it like that?

    • treesciencebot2 hours ago
      all high end "gaming" rigs are either using ~16 real cores or 8:24 performance/efficiency cores these days. threadripper/other HEDT options are not particularly good at gaming due to (relatively) lower clock speed / inter-CCD latencies.
    • noncoml4 hours ago
      Civilization VII won't run smoothly.

      Only recently I managed to build a PC that will run Civ 6 smoothly during late game on huge map

      • 7thpower3 hours ago
        What are the specs?

        Tangentially related, but I need to go check a18 civ 6benchmarks. The experience on my a15 with small map sizes was surprisingly good.