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OC'ing - Performance Increase

post #1 of 26
Thread Starter 
Alright, just a few quick question on OC'ing GPU's.

What will I see more of a performance increase from OC'ing, the Core, Shader or Memory?

If I lower the Shader can I go higher on the Core? This is something I've heard, but I'm not sure how much truth there is in it.

If an OC is stable in ATI Tool when scanning for artifacts, is it going to be stable when gaming, so I won't get artifacts and drivers stopped responding?

Thanks!
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post #2 of 26
Quote:
Originally Posted by Kornowski View Post
Alright, just a few quick question on OC'ing GPU's.

What will I see more of a performance increase from OC'ing, the Core, Shader or Memory?
Core yields the most FPS boost, memory the least.

Quote:
If I lower the Shader can I go higher on the Core? This is something I've heard, but I'm not sure how much truth there is in it.
No

Quote:
If an OC is stable in ATI Tool when scanning for artifacts, is it going to be stable when gaming, so I won't get artifacts and drivers stopped responding?
Most of the time, yeah. Although personally, even a game like Portal stresses my card more than ATI Tool does. But in most cases it's not enough of a difference to go from not artifacting to artifacting.
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post #3 of 26
Core will give you more of an increase.

Usually, the core and shader are linked when overclocking.

It's not a guarantee that a pass in ATI Tool will result in card stability, but it's a good indicator since some games may stress the card in ways the ATI Tool did not.
 
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post #4 of 26
Core speed has the most impact on your speed. If you fold then increase your shader clock.
post #5 of 26
Usually it's Core > Shader > Memory... though obviously shader-intensive games benefit from shader OC the most, and memory OC usually yields significant boosts when gaming at really high resolutions...
post #6 of 26
Core gives you the greatest increase, while the others do help a bit, they only make a slight difference. The core is your main priority.

And, yes, if you can run ATItool fine, most games will work fine. Except Crysis. lol
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post #7 of 26
Thread Starter 
Thanks a lot. I haven't read through properly because I'm about to go out, but I'll check over it later!

Another quick question, does the 'Find max core' in ATI work, will it be useful?
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post #8 of 26
No, I would try to find it out manually, since it may still be presenting you with modest results.
 
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post #9 of 26
Guys my 8600GT factory OC'd has 680mhz core default..

It can be set to 740mhz stable .. heat at 70* max when gaming..

what is a maximum heat that i must not go higher..

I might be able to increase the core if i don't like my Shader & memory
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post #10 of 26
As long as your card is not artifacting/crashing and you have your GPU fan keeping up with high temps (I have RivaTuner set using three fan profiles to keep my overclocked cards cool) then you should be fine. Generally anything above 90C and you're getting really hot.
 
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