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CPU OC & frame rates

post #1 of 4
Thread Starter 
i was about to overlock my cpu following the instructions of this great guide i googled (was very simular to some of the faqs on these forums only this one had more pictures ) ... until i saw the benchmark section of the guide where he tested his results in doom 3 and farcry and gave graphs of his FPS

they gave good fps increases with low settings but there was almost no gain in FPS when most settings were run on high

since im a candy eye man getting better frame rates on high settings is my main goal in overclocking, but if the cpu wont give anything is there any point in doing it? or do those sort of results come from overclocking the gpu (which i havent done yet)

or maybe its the games themselves? doom3 and farcry are more reliant on gpu than cpu compared to newer games like oblivion, f.e.a.r and the like which have much better physics engines which use more processor, therefore overclocking might come more in handy here, not entirely sure if this is right tho

help?

benchmarks from guide: http://www.short-media.com/review.php?p=54&r=300
    
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post #2 of 4
This is what's happening:

When you run lower resolutions and no AA/AF, the CPU is the limiting factor. The GPU can easily handle the game, given the high frames. However, the CPU is driven to the max (not too surprising with a 3500+ and an X850... that card has some good raw power). Thus, when you overclock the CPU, framrates jump, since the CPU limitation is less.

However, at higher resolutions and AA/AF, the GPU will become the limiting factor. Thus, in these situations, you can overclock the CPU as much you want, but it won't help you a lot, since it's the GPU holding you back.

In your case, you have both a more powerful CPU (slightly) and a much more powerful GPU (quite a bit). Thus, I expect the CPU to be a more limiting factor at higher resolutions with AA/AF. The only real way to find this out is by trying it out. Set the games at the settings you desire, and play it while recording the frame rate (you can use FRAPS for that).
    
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post #3 of 4
Thread Starter 
just relised it was only on 1600x1200 that there was no performance gain, i run fps games 1024x768 and rts 1280x1024 so it might be more evident then, still i run aax4 and full shadows, which he had off
    
CPUMotherboardGraphicsRAM
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post #4 of 4
My explanation in my previous post still stands

Just try it out with a mild overclock and see if there is a difference
    
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CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
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