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GPU usage

post #1 of 14
Thread Starter 
I'm playing Mafia 2 and my FPS dips below 30 FPS sometimes. It makes the game unplayable. I have no idea why my GPU usage is stuck at 59%. I've already set it to maximise performance but it's still at 59%. Anyone have any ideas why this is happening? Are there any ways to increase the GPU usage? Thanks in advance. I'm using a GTX 460 1GB btw.

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post #2 of 14
Maybe your cpu cant keep up ?

when you reach that 59% usage is your cpu usage at 100% then ? if yes then there is your awnser.

If not,

Do you run your games with Vsync on ? if yes then turn it of and see if usage go up.
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post #3 of 14
CPU should be fine.
But even if the CPU is starving the game, you won't see 100% usage on the CPU.

Are you running it with physx?
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post #4 of 14
Thread Starter 
Highest recorded CPU usage was 81%. Both v sync and physx is off.
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post #5 of 14
81% is pretty high.
Make sure there is nothing running in the background.

Also, try turning on AA if you hadn't.
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post #6 of 14
Run Everest and log CPU/RAM useage while you play.
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post #7 of 14
Thread Starter 
Here it is. Mafia2 was lagging horribly when it was benchmarking.

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post #8 of 14
Don't Alt+Tab to much in mafia, My 470 is always at high 90s when playing Mafia 2 thumb.gif
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post #9 of 14
I don't think physX is really turned off dude. I remember that selection being buggy back when I was testing that game a lot a few months back. I.E. sometimes the in game physX selector was 'wrong' ... it'd say physX was on high, but it really wasn't, and vice-versa.

These results you show/describe with the gpu and cpu usage match exactly with what I'd expect with physX running. The physX usage on your GPU doesn't show up when the card is also rendering, so that's why it looks like your stuck around 60% ... you can't 'see' the usage that's doing physX. Also, w/o a dedicated physX card, the cloth physX will run on the CPU, which causes very high CPU usage and some bottlenecking.

I don't remember what the solution was exactly, but try turning physX on High in the game, and setting physX to run on your GPU in the NVCP, and run the game again. Do you get pretty much the exact same results you do now? If so that's a sure sign that the problem is ... physX is running.
    
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post #10 of 14
Thread Starter 
I'll try turning physx "on" later on when i'm home. Will update again later.
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