1. Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

PC Game Stuttering, Input Lag and YOU!!!! <---

Discussion in 'AMD / ATI' started by EastCoasthandle, Mar 14, 2009.

  1. EastCoasthandle

    EastCoasthandle New Member

    Joined:
    Apr 21, 2005
    Messages:
    6,889 (1.90/day)
    Thanks Received:
    1,506
    I've found that from time to time I noticed some intermittent stuttering that would rear it's ugly head during specific aspects of game play. Most notably during times were replays and cinematic animated cut scenes were played. The actual game play didn't exhibit this behavior and played fine.

    Upon researching a fix for steering wheel input lag when playing PC racing games; which are not found on the console. I stumbled upon a suggestion that if you disable flip queue (pre-rendered frames) it would help improve input response. From my understand Radeons are set to a pre-rendered frame of 3. Sure enough it worked but I also noticed that replays were smoother then before and to me, looked different then before. So after some further testing in other games I begin to notice a trend. This fix works! :toast:

    In order to disable this you have to download Ati Tray Tools (unless there are other programs/tweaks out there). Install ATT and go to 3D and Flip Queue Size. Change it from Undefined to 0. The screen may flicker for a moment and return to normal. With ATT minimized in the lower right corner of your screen try a game and see if stutter decreases.

    One thing I have noticed is that depending on the game you may get a slight decrease in frame rates. Furthermore, as with any tweak like this, it may or may not be compatible with your PC/OS/Games/ETC. What works for me just fine may/may not work for you.

    From the few games I've tried so far I have noticed no stutter at all during cut scenes, replays, etc. And the input response time is much better now.
     
    Last edited: Mar 14, 2009
  2. EastCoasthandle

    EastCoasthandle New Member

    Joined:
    Apr 21, 2005
    Messages:
    6,889 (1.90/day)
    Thanks Received:
    1,506
    Update!!!!<---

    I have found that you can leave flip queue size (pre-rendered frames) at it's default. If the Transaction Booster is relaxed a little (IE using a higher value or it's default value for that ram) then I still notice an overall improvement during cut scenes, etc. I am not totally convienced that input lag has been reduced on the same level as setting pre-rendered frames ahead is set to 0. But there is some noticeable smoothest.

    It appears that although I can lower the performance level of my ram (which can provide a slight performance benefit in some memory intensive benchmarks) it maybe attributing to some odd stuttering. I thought that it was flip queue size that was the problem. However, this may not be the case.

    I used Memset to determine the performance level (aka Transaction Booster) of my ram.
     
    Last edited: Mar 22, 2009
  3. Baam New Member

    Joined:
    Aug 14, 2008
    Messages:
    93 (0.04/day)
    Thanks Received:
    18
    Location:
    Trucker..so all over
    I tried this and with it set to 0 None of my games will even start, so i set it back to undefined. This is with Windows 7, so maybe it just don't work right with windows 7.
     
    Kei says thanks.
  4. EastCoasthandle

    EastCoasthandle New Member

    Joined:
    Apr 21, 2005
    Messages:
    6,889 (1.90/day)
    Thanks Received:
    1,506
    Interesting, I found this wiki about it. They call it output lag:

    Yeah, that's why I wanted to make sure I posted that this may not work on other OS, etc in the OP :toast:.

    So far here's the deal:
    -The offical cat drivers for win7 start with Cat 9.3. Baam may want to try this again. Although there is no guarantee this will still work
    -When you reduce flip queue size to 0 there is a reduction in frame rates but input response should be improved in FPS games and motorsport games (for example)
    -This may or may not work for everyone depending on OS, PC setup, etc used so caution is expected
    -Relaxing the PL of your ram may smooth out game play but may/may not have any tangible effect on input lag
    -There are a few topics regarding this issue when googling

    Edit:
    Read this thread. It IMO seem to explain why rendering frames ahead causes input lag.
     
    Last edited: Mar 22, 2009

Currently Active Users Viewing This Thread: 1 (0 members and 1 guest)

Share This Page