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Help with Overclocking

post #1 of 8
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Hi Guys,

I have an EVGA GTX 570 Superclocked (don't know if that makes any difference) card. Can anyone point me in the direction of a guide or tell me about the shader clock specifically? I have read that the shader clock is the one that actually sets the arithmatic speed of the GPU, rather than the core clock, is this right?

Im not sure whether to knotch up the core clock and the mem clock, or the shader clock and the mem clock, or all three together?

I am using EVGA precision.

Thanks for your help
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post #2 of 8
In general, the core and shader speeds are 'linked' together by precision/afterburner, maing they are locked in a specific ratio (1:2, respectively). There is not much of a point in trying to break this ratio; just adjust the core speed to your desire. Memory speed is generally separate from the other two. Basically, work on getting a stable core clock (the shader will scale to it as long as they are linked) and then see what you can get out of the memory. Graphics overclocking is as easy as it looks.

EDIT: You may want to also check out afterburner as it is much more comprehensive and has more features. I would have linked you to the Beta 4 build, but the link is dead atm.
Edited by Infinite Jest - 8/13/11 at 2:33pm
post #3 of 8
Yep just everything above is true. The core and shader are actually linked by the architecture of Fermi (the type of card you have) so I don't even think it's possible to unlick them but if it were you wouldn't want to. Other thing I would add to the above is that core/shader is much more important than the memory clock, memory brings such a small performance increase that I don't even bother with it.

Here is a little basic OCing info that may help you.
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post #4 of 8
Quote:
Originally Posted by juano View Post
Other thing I would add to the above is that core/shader is much more important than the memory clock, memory brings such a small performance increase that I don't even bother with it.
I think you meant in just Fermi GPUs. Overclocking the memory in 2xx or earlier cards is as effective as overclocking the GPU.
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post #5 of 8
No I wasn't aware of that because I'm not very familiar with cards before Fermi so thanks for the info. I do however understand that some cards may be more constrained by their stock memory clocks than others, so either way I should have clarified.
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post #6 of 8
Quote:
Originally Posted by juano View Post
No I wasn't aware of that because I'm not very familiar with cards before Fermi so thanks for the info. I do however understand that some cards may be more constrained by their stock memory clocks than others, so either way I should have clarified.
Don't worry about it. But yeah. I've looked into overclocking the memory on ALL Fermi cards and it has little effect on performance (Might have something to do with the GDDR5 memory).

On the other hand, I believe that every single 200/9000/8000 cards benefit greatly from increased memory frequency. I've tested several and I always get noticibale increase in performance when I overclock the memory.

I can't say the same about any AMD cards though as I've never worked with any of them.
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post #7 of 8
I've heard that if you can get them really really high on 460/560s then it starts to almost be worth it but that's about it from what I've heard/seen.


Psssh AMD who bothers with those...
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post #8 of 8
AMD

Okay okay. /stopfanboyism
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