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. Do not post "I have the same issue" in an existing thread with a game crash, always open your own thread. Do not PM developers and staff members for personal troubleshooting and support.
  2. As part of our continuous maintenance and improvements to Assetto Corsa Competizione we will be releasing small updates on a regular basis during the esports season which might not go through the usual announcement process detailing the changes until a later version update where these changes will be listed retrospectively.
  3. If ACC doesn't start with an error or the executable is missing, please add your entire Steam directory to the exceptions in your antivirus software, run a Steam integrity check or reinstall the game altogether. Make sure you add the User/Documents/Assetto Corsa Competizione folder to your antivirus/Defender exceptions and exclude it from any file sharing app (GDrive, OneDrive or Dropbox)! The Corsair iCue software is also known to conflict with Input Device initialization, if the game does not start up and you have such devices, please try disabling the iCue software and try again. [file:unknown] [line: 95] secure crt: invalid error is a sign of antivirus interference, while [Pak chunk signing mismatch on chunk] indicates a corrupted installation that requires game file verification.
  4. When reporting an issue with saved games, please always zip and attach your entire User/Documents/Assetto Corsa Competizione/Savegame folder, along with the logs and the crash folder (when reporting related to a crash).

gpu frame time "pulse"

Discussion in 'ACC Hardware Discussions' started by georgi iovchev, Jun 13, 2020.

  1. Currently I dont have other unreal engine games installed.
    Looking at list of games https://en.wikipedia.org/wiki/List_of_Unreal_Engine_games#Unreal_Engine_4
    I think I got Ark: Survival Evolved from that list recently it was free in the Epic store. I might try it.

    Timing was approximately 1 hour .. usually about that time I take a little rest from driving :)

    Actually the issue could be related to my hardware. I have wireless headset SteelSeries Arctis 7, and it is set to turn off the headset after 10 minutes of no sound. Yesterday the game was paused and the headset has automatically turned off. So I thought it could be related. I tried to reproduce the issue manually - I started new hotlap session, then paused and waited a 2-3 minutes and manually turned off the headset, then when I unpaused and returned to the garage the frametime pulses started. I tried to do it again multiple times, but it didnt happen... very strange. I could be just a coincidence or it could be related I dont know :)
     
  2. So a little bump. This pulsing issue continued to bother me and sometimes the frame time peaks were very high making the game very stuttring.

    Following is the list of things I tried/changed over time:
    - real fullscreen (disabled fullscr optimizations ac2-...exe)
    - borderless
    - fullscreen
    - nv drivers 450.99
    - nv drivers 451.48
    - hwags off and on
    - no msi ab running
    - gsync off / on
    - windows hi perf power plan
    - amd balanced power plan
    - amd hi perf power plan
    - nv driver 451.67
    - stopping unnecessary windows services before launch
    - not connecting the phone to pc usb
    - acc v1.5.0
    - vsync on and off
    - acc v1.5.1
    - mb bios A4
    - nv drivers 451.85
    - remove all OC (cpu/mem/gpu)
    - start only with sim dashboard telemetry app
    - install clean windows and acc on another ssd drive
    + not using telemetry app at all (starting the game without any telemetry app)
    + using only simhub as telemetry app
    - disconnect network cable in session after the pulses start - not fixing
    - acc v1.5.2

    + means that it is ok and the frametimes are not pulsing

    So generally I am pretty sure that the issue is related to the telemetry apps, because when there is no telemetry app connected there is no problem. I am not sure if the apps are the problem or the broadcasting mechanism of the ACC itself. It happens when I use SimDashboard or ACC Result Companion, but it does not happen with SimHub. May be they receive the telemetry data differently I dont know.

    P.s. here is video of worst case scenario


    P.s.2. Finally nailed the issue to sim dashboard app. Reported and it seems to be fixed in simdash latest beta 3.3.0.0
     
    Last edited: Sep 5, 2020

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