Help with stuttering / lag on 7970?

bamaaviator

Member
Apr 14, 2008
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Bought 7970 card to run eyefinity and a triple monitor system.

Played Star Wars and ran 2 instances of the game with no lag between either instance of the game running.

Now I am getting screen lag / stutter on any application playing on the 2nd or 3rd screen now.

Basically any screen that isnt the "active screen" has noticeable delay / lag....wether it be watching a youtube video, or running a 2nd application.

I have the i7-960 processer. I dont remember it doing this before, what do I need to do to fix this?

While Im typing this, on the 1st screen, everything on the 2nd and 3rd are stuttering. Doesnt matter if I drag this to a diff screen.

Basically, whenever I tab to a diff application, everything else stutters if that makes sense. It didnt use to do this before. Dont believe it has anything to do with which screen is the active display, just If im using IE or Chrome, the other programs stutter and vice versa.

Hope thats enough information.
Edit...

Also remember running 2 instances of EQ2 very well before too. I remember playing a game that asked me to change the CPU Affinity, and dont know much about it. Wondering if that could have something to do with it as well.

Edit 2....

Just changed affinity back to all processors on both applications, still have massive stuttering on whatever the background application that is running.
 
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BrightCandle

Diamond Member
Mar 15, 2007
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Its due to a bug in powertune. They set the clocks too low for eyefinity resolutions and the frame rate in windows is too low. I saw the same thing with windows stuttering across the screen and an unhealthy amount of input lag.

I would like to tell you I knew of a fix, and I kind of do but I also know it often doesn't work. You need to edit the XML file for a profile you have saved and set the clock speeds higher and make the profile read only. I would recommend setting to maximum clock speeds and then seeing if that resolves it. If it does then you can loose the power saving but at least get rid of the graphics lag. On the plus side if you run full clock all the time then you can rely on your card always running at fill speed, because for whatever reason sometimes in some games they don't.
 

bamaaviator

Member
Apr 14, 2008
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I am not running eyefinity resos though. I have 1x browser window 1x game window, and another 1x game window all running at 1920x1080 I believe.

Would that still be a problem?
 

Hitman928

Diamond Member
Apr 15, 2012
6,751
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I am not running eyefinity resos though. I have 1x browser window 1x game window, and another 1x game window all running at 1920x1080 I believe.

Would that still be a problem?

Can you show us a gpuz log while you're experiencing this?
 

bamaaviator

Member
Apr 14, 2008
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Sleepingforest

Platinum Member
Nov 18, 2012
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I'll make a basic suggestion of using RadeonPro. Create a profile for the game in question. There should be a tab called "Tweaks." Within Tweaks, set "Dynamic Frame Control" to on. If you cap the framerate to your average framerate or to the screen refresh rate (whichever is lower), you evidently get a much smoother experience. If you don't know your average framerate, you can find out using a tool like Fraps.