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Order in overclocking ram, cpu, and gpu - Page 2

post #11 of 43
Quote:
Originally Posted by Forceman View Post

Depends what you are doing. For gaming, I'd say GPU, CPU, then RAM. You are much more likely to be GPU-limited than CPU.
In my experience, and I can show Futuremark ORB results if you wish, CPU contributes at least 50% of OC results in 3dm11; that may change with the next release of 3dmark. Also note that the Heaven 3.0 bench is nearly, totally GPU dependent; OCing the CPU adds very little. And I agree, to test CPU OC stability run at least one full pass of Prime95 Blend test.
So, first find max CPU OC and then, set CPU clocks back to default, and find max OC for the GPU(s). Use Heaven 3.0 for stability testing.
Now what will happen, more than likely, at least in my experience, is you'll find when setting both CPU and GPU to max OC you won't be able to run 3dm11 or Heaven without backing off the CPU OC a tad. I've tried backing off GPU max OC, but backing off CPU OC yields the best scores for me anyway.
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post #12 of 43
Quote:
Originally Posted by OS-Wiz View Post

In my experience, and I can show Futuremark ORB results if you wish, CPU contributes at least 50% of OC results in 3dm11; that may change with the next release of 3dmark. Also note that the Heaven 3.0 bench is nearly, totally GPU dependent; OCing the CPU adds very little. And I agree, to test CPU OC stability run at least one full pass of Prime95 Blend test.
So, first find max CPU OC and then, set CPU clocks back to default, and find max OC for the GPU(s). Use Heaven 3.0 for stability testing.
Now what will happen, more than likely, at least in my experience, is you'll find when setting both CPU and GPU to max OC you won't be able to run 3dm11 or Heaven without backing off the CPU OC a tad. I've tried backing off GPU max OC, but backing off CPU OC yields the best scores for me anyway.

Are we talking about overclocking for actual use, or for benchmarks? Are we talking about the order of overclocking, or the order of importance of overclocking?

Because for real games you are going to get more visual and performance benefit from overclocking the GPU, unless you are stuck on some ancient CPU. I don't do competitive 3DMark (although I do understand that is important for some people), so I'm basing my comments on real-world gaming.
Edited by Forceman - 1/20/13 at 11:09am
post #13 of 43
My sentiments mirror Forceman's.

If you are gaming, a GPU OC should be your priority.

Anyway, CPU speed is almost always vastly more important than memory speed, and yes, very high clocks on one or the other can sometimes inhibit OCing of the other component. Performance is not entirely independent either.

Modern Intel parts run the IMC at full CPU speed, so higher CPU clocks simultaneously improve memory performance while making it slightly harder to get the most out of the memory itself.
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post #14 of 43
Thread Starter 
Quote:
Originally Posted by OS-Wiz View Post

In my experience, and I can show Futuremark ORB results if you wish, CPU contributes at least 50% of OC results in 3dm11; that may change with the next release of 3dmark. Also note that the Heaven 3.0 bench is nearly, totally GPU dependent; OCing the CPU adds very little. And I agree, to test CPU OC stability run at least one full pass of Prime95 Blend test.
So, first find max CPU OC and then, set CPU clocks back to default, and find max OC for the GPU(s). Use Heaven 3.0 for stability testing.
Now what will happen, more than likely, at least in my experience, is you'll find when setting both CPU and GPU to max OC you won't be able to run 3dm11 or Heaven without backing off the CPU OC a tad. I've tried backing off GPU max OC, but backing off CPU OC yields the best scores for me anyway.

So why not OC the CPU and NOT clock it back to default when OCing the GPU?
Quote:
Originally Posted by Blameless View Post

My sentiments mirror Forceman's.

If you are gaming, a GPU OC should be your priority.

Anyway, CPU speed is almost always vastly more important than memory speed, and yes, very high clocks on one or the other can sometimes inhibit OCing of the other component. Performance is not entirely independent either.

Modern Intel parts run the IMC at full CPU speed, so higher CPU clocks simultaneously improve memory performance while making it slightly harder to get the most out of the memory itself.

Then is it better to OC the GPU first before the CPU to get the most out of the GPU?

What do you mean by this "Modern Intel parts run the IMC at full CPU speed, so higher CPU clocks simultaneously improve memory performance while making it slightly harder to get the most out of the memory itself." ? You mean high CPU clocks will limit the RAM OC?
post #15 of 43
Quote:
Originally Posted by kevindd992002 View Post

What do you mean by this "Modern Intel parts run the IMC at full CPU speed, so higher CPU clocks simultaneously improve memory performance while making it slightly harder to get the most out of the memory itself." ? You mean high CPU clocks will limit the RAM OC?

yes. sometimes you have to lower your cpu overclock to get higher ram overclocks and vice versa. on top of that, or further on that, it takes more vcore to run higher ram speeds.
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post #16 of 43
Thread Starter 
Quote:
Originally Posted by pc-illiterate View Post

yes. sometimes you have to lower your cpu overclock to get higher ram overclocks and vice versa. on top of that, or further on that, it takes more vcore to run higher ram speeds.

So if I understand all of this clearly, for gaming the overclocking effect hirarchy would be GPU -> CPU -> RAM, yes? Then it makes sense to OC in that order?
post #17 of 43
i doubt it matters 1 bit if you clock the gfx card or the cpu first. ive never seen 1 affect the others abilities clock wise. i think what the other 2 were getting at was just that games rely more on graphics than cpu, most games. with a core of 1200mhz on our cards, pretty much every game is going to be maxxed out. the cpu is going to limit the minimum frames
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post #18 of 43
Thread Starter 
Quote:
Originally Posted by pc-illiterate View Post

i doubt it matters 1 bit if you clock the gfx card or the cpu first. ive never seen 1 affect the others abilities clock wise. i think what the other 2 were getting at was just that games rely more on graphics than cpu, most games. with a core of 1200mhz on our cards, pretty much every game is going to be maxxed out. the cpu is going to limit the minimum frames

Not really, you have to re-read their posts. They are exactly implying that GPU OC can affect CPU OC.
post #19 of 43
and i said it doesnt. either the cpu bottlenecks or it doesnt. thats it. the cpu has NOTHING to do with a graphics card overclock. a graphics card has no effect on a cpu. i would love to see first hand proof. its hilarious to even think that.
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post #20 of 43
Thread Starter 
Quote:
Originally Posted by pc-illiterate View Post

and i said it doesnt. either the cpu bottlenecks or it doesnt. thats it. the cpu has NOTHING to do with a graphics card overclock. a graphics card has no effect on a cpu. i would love to see first hand proof. its hilarious to even think that.

When I said "not really", I meant according to their posts IT DOES. I can't claim anything for myself here because I don't have any proof. I'm just reiterating what os-wiz posted above. He claims that GPU OC affects CPU OC and vice versa, unfortunately in an inversely proportional way. Please correct me if I understood them wrong.
Edited by kevindd992002 - 1/20/13 at 6:31pm
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