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  • Trebh
    replied
    Originally posted by rbmorse View Post
    I'm sorry I can't offer insight or assistance, but I'm interested because I'm planning to do this same build later this year, albeit with just one video card.

    The only thing I can offer is from the chicken superstition category. I've had ASUS boards in the past that arrived with decidedly wonky setup data in their CMOS that caused all sorts of odd behavior even though the setup values appeared to be correct. My routine now is to enter the system setup on first boot, select the "load optimal defaults" option then save and shutdown. On power up I can re-enter setup and make the adjustments appropriate for my usage.

    The other thing I would suggest is to run Memtest to see if a memory module(s) isn't performing to spec, or with RAM parameters at JEDEC nominal timings and voltages (2133 and 1.3v ?) if Memtest isn't available.
    Thanks for the help anyway!

    I actually already reset CMOS and I did flash BIOS again to make sure it was up to date with the latest version on the motherboard.
    I tried ramspeed test with PTS and RAM performance is actually pretty nice, so I doubt it's the cause of my issue.

    Leave a comment:


  • rbmorse
    replied
    I'm sorry I can't offer insight or assistance, but I'm interested because I'm planning to do this same build later this year, albeit with just one video card.

    The only thing I can offer is from the chicken superstition category. I've had ASUS boards in the past that arrived with decidedly wonky setup data in their CMOS that caused all sorts of odd behavior even though the setup values appeared to be correct. My routine now is to enter the system setup on first boot, select the "load optimal defaults" option then save and shutdown. On power up I can re-enter setup and make the adjustments appropriate for my usage.

    The other thing I would suggest is to run Memtest to see if a memory module(s) isn't performing to spec, or with RAM parameters at JEDEC nominal timings and voltages (2133 and 1.3v ?) if Memtest isn't available.

    Leave a comment:


  • Trebh
    started a topic New system weird PTS results

    New system weird PTS results

    Hi Everyone,

    I have just built my new system, installed Arch and doing some initial benchmarks I'm getting very weird results.
    Both CPU and GPU show really bad performance in multiple workloads tested with Phoronix Test Suite.

    Some data about the system

    OS: Arch Linux
    Kernel: x86_64 Linux 5.0.4
    CPU: Threadripper 2950x currently clocked at 4Ghz
    Motherboard: Asus Zenith Extreme Alpha
    Bios version: 0207
    RAM: 64 GB at 3000Mhz
    GPUs: 2 x RTX 2080 ti Gigabyte turbo

    nvidia driver version: 418.56

    from nvidia-smi:
    power usage cap is 250W
    Performance level is correctly ramped up by PowerMizer (nvidia-settings). Setting it to max performance manually doesn't change results.

    CPU and Gpus are watercooled with a custom loop by EK: 360 + 240 radiators, loop order pupm/res combo, CPU, 360 rad, GPUs (parallel), 240 rad, pump/res combo
    Temperatures are ~40 C idle, ~60C highest load. They are higher than I expected, and I might reseat both GPUs / replace thermal paddings, but I don't think that I am reaching thermal throttling.

    Everything during BIOS setup and software installation went smoothly, all hardware is recognized properly and Arch seem to be working just fine as always.

    BUT.
    Performing some PTS unigine benchmarks I am getting ~ 20 fps in every test (valley, heaven, superposition), doesn't matter if I change settings from basic to ultra or whether I toggle occlusion shadows or refraction.
    Power draw ranges from ~ 80W to 200W when doing Unigine superposition at Ultra settings.
    Gpu utilization ranges from 15% to 60%.

    At first I thought about some NVIDIA driver issues, then I started some tests on the CPU and core performance is very bad too.
    Example: Scimark2 Computational test: composite yields a result of 488 Mflops, lower than an AMD Athlon II. Just for comparison, a Core i3 2100 on Openbenchmarking.org scores 1065 Mflops.
    I get silmilar results from other tests aswell.
    I also tried multithreaded benchmarks like himeno and again I get 1087 Mflops. i7 6700K scores 2626 Mflops.

    Anomalies during CPU tests I noticed with top:
    single core usage doesn't go past ~50% (shouldn't it stress to 100%?)
    multithreaded tests are actually using just one core (and it goes to 100% usage in these tests)

    from sensors data:
    CPU temperature is ~13C idle, reached 25C during tests at worst, then went down quickly.

    To complete the overview, ramspeed test with Phoronix Test Suite yields expected results. RAM seem to be working nicely.

    Any idea about what's going on? Am I missing something obvious? GPU bad performance could be the result of a bottleneck due to CPU single core severely underperforming - afterall I am pairing lower-than-i3 performance with a double 2080 ti - but then why is my TR behaving that badly? If this was due to some mistake I made during CPU seating I would expect to see way higher temps...
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