1. Do you need support for Assetto Corsa Competizione? Please use the proper forum below and ALWAYS zip and attach the WHOLE "Logs" folder in your c:\users\*youruser*\AppData\Local\AC2\Saved. The "AppData" folder is hidden by default, check "Hidden items" in your Windows view properties. If you report a crash, ALWAYS zip and attach the WHOLE "Crashes" folder in the same directory.
  2. FOR ASSETTO CORSA COMPETIZIONE: If you report issues with saved games, please always zip and attach your entire User/Documents/Assetto Corsa Competizione/Savegame folder!
  3. If your game executable is missing, please add your entire Steam directory to the exceptions in your antivirus software, then run a Steam integrity check or reinstall the game altogether.

Test: CPU Core count and RAM scaling in ACC, AC1 and R3E

Discussion in 'ACC Hardware Discussions' started by Daniel Costa, Aug 20, 2019.

  1. Daniel Costa

    Daniel Costa Racer

    Hello guys

    Couldn't find decent data so I did these tests myself during the holidays.

    • Max settings @ 720P (Max distances, Max shadows, Max mirrors etc) to push for the max cpu drawcalls.
    • Heavy duty multiplayer race replays were used, with 20~30 cars.
    • 1 entire lap per test. With the camera set on the pole car, looking backwards (showing all 30 cars - worse case scenario), at the race start, lasting an entire lap
    • 2 runs per test.

    Test 1

    CPU core count scaling




    Test 2

    HyperThreading ON / OFF scaling




    Test 3

    Ram speed scaling




    If you play offline against AI, none of these results should apply to your situation.



  2. Similar Threads
    Forum Title Date
    Chit Chat Room 95% cpu occupancy test. Oct 16, 2014
    GUI - HUDs - Apps Bugs & Issues Incorrect Fastest lap times Jan 13, 2020
    ACC Multiplayer Unjustified lap invalidation or penalties - TEST REQUEST Jan 9, 2020
    ACC Virtual Reality New VRRS feature in latest NVIDIA driver 441.87 Jan 7, 2020
    ACC Multiplayer Event test 50slots Dec 26, 2019
    ACC Physics So whats the overall fastest GT3 car? Dec 25, 2019
    ACC Virtual Reality Issues in VR with latest Oculus Rift firmware update - READ INSIDE FOR WORKAROUND Dec 5, 2019
    Console Lounge Weekly Hotlap Challenge #157 - Your Skills Will Be Tested Dec 8, 2019
    ACC General Discussions Driver Swap MP Test Event for teams Nov 29, 2019
    ACC Gameplay AI issue, Bug or an unfinished product for beta testing Nov 20, 2019
    ACC General Discussions Spa *BigGrid* race event / stress test Nov 6, 2019
    ACC Gameplay 1.1.2 - AI is completely broken in latest hotfix Oct 30, 2019
    ACC Multiplayer Spa expanded grid testing Oct 27, 2019
    ACC General Discussions Test Track with Skidpad Oct 13, 2019
    ACC Gameplay [1.0.10] Career mode (initial test) and AI performance. Sep 30, 2019

  3. Daniel Costa

    Daniel Costa Racer

    Here's the entire data if someone wants to confirm the charts

  4. baboon

    baboon Hardcore Simmer

    So ACC doesn't really scale with more than 4cores without AI. Do you think with AI it would be the same?
  5. Daniel Costa

    Daniel Costa Racer

    Well, we learned ACC rendering pipeline needs 4 cores until it starts being bottle-necked by the 1080TI again.

    But I'm pretty sure the AI would cause much much higher CPU usages with much lower FPS than my tests, specially in the 2-4 core counts without HT. But with 6 or 8 cores + hyperthreading ON, I think the framerates would be approximate to what I tested. I'm speculating. This needs another round of tests but I never play offline.
    alex bonner, baboon and gdavis626 like this.
  6. chksix

    chksix Simracer

    Awesome test!
    alex bonner and Daniel Costa like this.
  7. I can confirm this :) The change from I5-4670K to I7-4790K was a huge performance boost especially online and against the AI.
    AurusCE, Daniel Costa and Coanda like this.
  8. deadmeat2k

    deadmeat2k Racer

    Very nicely done :cool: and interesting to see the negative effect of HT.
  9. jaykinch

    jaykinch Gamer

    I was getting (not tested for a while ) huge stutter problems when I had ht turned off in vr
  10. Daniel Costa

    Daniel Costa Racer

    With your CPU, HT off means that you only have 4 threads to handle the game + windows and apps. Even though my tests show HT = OFF is the better result, it does not have into account VR and other apps you might have open in the background. So it makes sense you have stutters.
    After_Midnight likes this.

    FLATPAT Rookie

    Interesting test, thank you for posting this

    So 4 cores without HT are faster that 8 cores with HT. ...d@mn
    and 5 cores without HT gives the overall best result. ...stunning.

    In general i wonder if this is the result of a non-optimized unreal engine (i think so) or something that maybe Kunos could adjust in future.

    Did you have disabled HT and cores in the BIOS or with a software tool?
  12. Daniel Costa

    Daniel Costa Racer

    All changes were directly in the BIOS.
  13. Daniel Costa

    Daniel Costa Racer

  14. Also online racing is very demanding in ACC. Rendering cars similar to races against the AI. HT brings also online a huge performance boost in my case. Always related to the I7-4790K.
  15. Lord Kunos

    Lord Kunos His master's voice. Staff Member KS Dev Team

    In case of AC/ACC then it's not really very representative of the actual online playing.
    In replay all the physics threads are stopped so you are really only testing the graphics engine performance, not dissimilar from the AC benchmark mode (also a replay). So HT results are to be taken for what they are, especially in AC where you're basically running a single threaded app in that scenario.
    seb 6th gear, go.neil, Coanda and 5 others like this.
  16. Captain Barracuda

    Captain Barracuda Hardcore Simmer

    Lord Kunos is right, a benchmark feature in-game running full physics would help to obtain more accurate results :D
  17. Daniel Costa

    Daniel Costa Racer

    I see. Thanks
  18. Berniyh

    Berniyh Alien

    I think that if – designed right (basically add a huge number of AI cars) – ACC could be a very nice gaming benchmark for the CPU, but with the given possibilities the CPU is rarely limiting, so it's not so much of an issue anyway.
  19. Coanda

    Coanda Alien

    I am curious. Lets say one game likes HT and one game does not. Is there any software that can disabled/enabled HT per game? Currently I only know how to enable/disable HT via the bios.
  20. Max Doubt

    Max Doubt Racer

    You can use the task manager by finding the process in details when running, not very convenient but maybe easier than bios

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice