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Old 21-08-08, 07:28 PM
jmartis jmartis is offline
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FPS fluctuations

I sometimes get weird FPS fluctuations when standing still in a game (so the 3D environment change is negligible). I'm playing Trackmania if that is important.

What happens is that the FPS is e.g. at 140 then it sags to 100 for a second and back to 140. Sometimes it does this nearly all the time, sometimes it happens just rarely. The FPS sag is quite noticable when playing a game.

Anyone knows how to fix this?

Running WXP Pro, 8800GT with the latest drivers (177?)

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  #2  
Old 21-08-08, 07:48 PM
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JackyBoy JackyBoy is offline
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Does this happen just in trackmania or does it happen in all the games you play?
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Old 21-08-08, 07:50 PM
jmartis jmartis is offline
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Quote:
Originally Posted by name='JackyBoy'
Does this happen just in trackmania or does it happen in all the games you play?
I'll try that tomorrow, TM is the only game I installed on the new system so far. But I believe I saw it in 3DMark 06 too.
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Old 21-08-08, 08:10 PM
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JackyBoy JackyBoy is offline
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Yeah, have a little test, becuase i havent played TM before, but it might not be optimised well or something, so even though you cant see anything moving, it might still be rendering it behind the scenes. So your graphics card will be unnessasarily rendering things that you cant see
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Old 21-08-08, 08:18 PM
k4p84 k4p84 is offline
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.

If its a new build/install make sure all the drivers are up to date.

Pop fraps on and see what the actual fps change is

ED
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  #6  
Old 21-08-08, 08:29 PM
jmartis jmartis is offline
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Quote:
Originally Posted by name='k4p84'

Pop fraps on and see what the actual fps change is

ED
Thats what I did. It wents from 140 to ~105, "warbles" around a bit for 2 seconds then shoots back to normal.

I've seen this problem on my old PC too but there it was quite periodical (=predictable when the next sag happens) and was caused by some windows service IIRC, while on the new build it sags quite randomly...
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Old 21-08-08, 09:49 PM
k4p84 k4p84 is offline
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140 fps to 100 fps. for a game to seem smooth 60 fps is the target so if your getting 100-140 you shouldn't notice.

unless you have fraps on...
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  #8  
Old 21-08-08, 09:57 PM
jmartis jmartis is offline
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Quote:
Originally Posted by name='k4p84'
140 fps to 100 fps. for a game to seem smooth 60 fps is the target so if your getting 100-140 you shouldn't notice.

unless you have fraps on...
yes but it also jumps to 60 from 80, to 30 from 40 etc. It seems like some percentage of "computing power" is removed during the sags.
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  #9  
Old 21-08-08, 10:02 PM
k4p84 k4p84 is offline
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You will never get a constant 100, 80, 60, etc fps. It fluctuates depending on what needs to be rendered at that time mate.

The harder the environment you are in the lower the fps etc.

If you have a benching tool run it through like 4 times and not fps at certain events, they will usually stay fairly similar.

If you alter the settings, lower res, etc you will see an fps gain.

If they are all over the place, i meant that, not just a few fps then you may have some hard/software issues buddy

ED
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  #10  
Old 22-08-08, 07:31 AM
jmartis jmartis is offline
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Quote:
Originally Posted by name='k4p84'
You will never get a constant 100, 80, 60, etc fps. It fluctuates depending on what needs to be rendered at that time mate.

ED
Look at my first post, I stand still in the game so the 3D scene remains more-or-less the same, but FPS jumps. Sometimes its good for several minutes, then it will jump for a few minutes etc. It seems quite random.
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