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New hardware; low FPS..?

Discussion in 'ACC Hardware Discussions' started by Coanda, Sep 25, 2020.

  1. Coanda

    Coanda Alien

    I recently upgraded my CPU, MB and Memory (see signature) for some go fast bits..

    Mobile users: i9 10850K 10/20, 32GB 3800 CL14

    I am doing some stress testing and trying to understand why I do not receive for more FPS. I am testing my ultimate ACC scenario; 50 Ai at night with rain at Spa.. This test is during the day time so my PC room is a balmy 35 degrees therefore a couple of cores are running warmer than usual however nowhere near thermal throttling whilst running at 5Ghz. My ACC test setting are set with a resolution scale of 100% with all settings on Epic/High.

    As you can see from the video and monitored stats my GPU is only running at 50-60% and the bulk of the CPU work is mainly being done on 4 cores/threads.. I could be way wrong here however I vaguely remember Stefano @kunos saying in one of his Ai streams that ACC try's to use half your core/thread count +1..

    The FPS is running between 55-70 and regularly dipping under 60 FPS. Why is that and does this look normal to you..?


    Add: Last night I tested the same scenario however with 36 Ai, VSync and Screen resolution of 150%. The GPU was stressed more and mainly ran in the 80-90% range. It could maintain 60 FPS for the race start except for ER, No Name corner & Bus Stop. Often it would drop 5-15 FPS through these corners early in the race. When doing so I noticed the GPU went up to 92-95% load. I assume I am GPU limited here.
    Last edited: Sep 25, 2020
    Cirith Ungol likes this.

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  3. CPU limited !
    ACC is very hungry with AI.
    Even with such a good CPU, he is not able to deliver enough order to the GPU with 50 AI... So the GPU is waiting for the CPU and not on full load...
  4. Coanda

    Coanda Alien

    Why not allow more usage of available cores and threads..?
  5. I don't know, i'm not a Kunos dev...
    I just tried to explain you what is happenning.
    Try with less AI and you will have a more decent GPU usage...
  6. Coanda

    Coanda Alien

    I ran a new test however this time I synced all cores with a x 50 ratio (5Ghz), manual vcore voltage and disabled changed speed step/shift..

    The core loads where completely different from the OP. There was smaller oscillations and a lower core load average. The GPU was sitting around 65% and my FPS after the racer start was sitting around 80 FPS which is better.

    Last edited: Sep 28, 2020
  7. KillZoneGB

    KillZoneGB Simracer

    You could try and disable the HT thus increasing by doubling the Cache for each CPU core.

    This will also lower the cpu temp.

    might be able to increase your memory controllers speed to give you that extra oomph. <---(Be warned this puts extra stress on the CPU memory controler and could lead to problems)

    Sorry haven't OC a Processor since I7 4820K.
    Coanda likes this.
  8. Coanda

    Coanda Alien

    Thanks for the HT suggestion. I'll try this and see what happens.. Regarding the memory; they are already running at 3800 CL14 so I am not very comfortable pushing them any further..
    Last edited: Sep 28, 2020
    KillZoneGB likes this.
  9. FLO 1337

    FLO 1337 Rookie

    I tried your settings except all at epic and 100% res scale, got basically the same results, 52 to 70fps start of SPA. GPU @ 65% and CPU @ 35%.
    Coanda likes this.
  10. Coanda

    Coanda Alien

    Thanks for the info. I also ran the same test in the OP and our CPU chips should produce very similar gaming results. What I also noticed was, if I exchange night & rain for day & dry the GPU works a little harder. I did not expect that..
    Last edited: Sep 28, 2020
  11. Coanda

    Coanda Alien

    @KillZoneGB - I disabled HT. It ran a little better and all 10 cores had good solid load.. Thanks!

    It's a little confusing because most people say to leave it on..
    KillZoneGB likes this.

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