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Too high of a over clock cause slower fps?

post #1 of 10
Thread Starter 
Just curious if i over clock my gpu to far could it actually slow down fps in games? Same for my cpu?

Thanks...

Also looking for a good software program to test data transfer rate of my CPU to see if i actually gain some performance from 3.2Ghz to 4.0Ghz.
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post #2 of 10
Unless you overclock to the point where a core drops offline due to heat issues.... which I have NEVER heard of....

Also, Avatar win.
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post #3 of 10
Yes. Unstable == Slow.
post #4 of 10
Quote:
Originally Posted by amdcpu4life View Post
Just curious if i over clock my gpu to far could it actually slow down fps in games? Same for my cpu?

Thanks...

Also looking for a good software program to test data transfer rate of my CPU to see if i actually gain some performance from 3.2Ghz to 4.0Ghz.
If your overclock is unstable then it will likely perform worse than a slower, stable overclock. If you can make it through 12-24 hours of prime 95 you are good.
post #5 of 10
Thread Starter 
When playing Crysis on all Very High and 2x aa @ 1440x900 with 3.4Ghz i get a constant 35 fps. When i over clock the CPU to 4.0Ghz it doesn't increase the fps one bit.
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post #6 of 10
overclock your graphics card...it probably needs the boost if u want fps
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post #7 of 10
Quote:
Originally Posted by amdcpu4life View Post
When playing Crysis on all Very High and 2x aa @ 1440x900 with 3.4Ghz i get a constant 35 fps. When i over clock the CPU to 4.0Ghz it doesn't increase the fps one bit.
Quote:
Originally Posted by PCSarge View Post
overclock your graphics card...it probably needs the boost if u want fps
what he said. if your FPS increades because of your OC from stock it was because you had a CPU bottleneck. Now your GPU is able to tax its self out. Now you want more FPS OC you graphics card so it can perform better
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post #8 of 10
Yeah, I think the GPU might be more of the culprit here given the lack of fps change. Also, check the state of vsync (be sure it is off) just in case. I have had strange cases where I got under 60fps in a game yet saw increase in framerate (still below 60) after disabling vsync.

A high overclock is meaningless unless it is stable.
(I'm going to avoid technical jargon here) A high clock speed basically means you are attempting to make the CPU make it's computations faster. Each one was designed and guaranteed to produce correct results at a given clock. When one forces the chip to operate beyond this stock speed, that accuracy is no longer guaranteed; which is why we test for OC stability with Prime95,IBT, etc to see if the computations are indeed correct at that speed/voltage/heat combo.

This is why it is entirely possible to have a high overclock and terrible performance (and crashes) because the CPU fails to execute the tasks presented to it by the requesting program (be it the OS or a game) etc.

If you have ever played with sequential logic synchronous (clock-dependent) designs you might have noticed that at beyond certain threshold clock frequencies, your circuit behaves in a very weird ways (Counters screw up, etc.) because the circuit was not designed to operate at that speed. The same logic applied to overclocking the components of your computer.

If you play with your GPU clocks and notice a change in framerate, then that was probably the culprit all along.


Edited by dklimitless - 8/8/11 at 8:43pm
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post #9 of 10
OC'ing your GPU or CPU to the point of instability may cause a drop in performance, yes, that can happen. Usually you'll just crash, but it's possible to be right on the edge between working an crashing, and it could cause your FPS to dip slightly or have no gain even though you've OC'd more.

However the fact that OC'ing your CPU produced no FPS gain in Crysis 2 at the settings you're playing at more likely just means that you're in a purely GPU-bound situation playing Crysis 2 at the settings you're playing it at, hence making the CPU faster has no effect on FPS.
    
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post #10 of 10
GTX 260 is still a pretty tough little card, but it is several years old, and should not be relied upon to supermax crysis 2. I'm actually impressed with the little guy doing about 30fps on supermax. That's pretty darn good.
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