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~~The GTX 670 Overclocking Master-Guide~~ - Page 239

post #2381 of 3357
Here are my attempts with 2x Gigabyte GTX 670 OCs with a modest overclock on the CPU (3930 @4.7). Both have the bios that allows power up to 125% and slightly higher voltage.

So here they are:

SLI score 2 x GTX 670s - P 18558 using 320.00 drivers

I am slightly bound by the second card which doesn't overclock well. If it was like my first card, 19k+ is easily achievable



http://www.3dmark.com/3dm11/6493071



Single card GTX 670, 3930 @ 4.7. This 670 flies at near enough 1400 MHz core (314.22 drivers) -P 11535



http://www.3dmark.com/3dm11/6488664
post #2382 of 3357
My attempt at my 670:

1176/7000!!

    
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post #2383 of 3357
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post #2384 of 3357
Quote:
Originally Posted by VindalooJim View Post

Worth overclocking my two 670 FTWs? What kind of real world performance increase could I expect FPS wise? (I know that this varies chip to chip) but a rough estimate.
about 10%
post #2385 of 3357
why do i crash if i put my power target at 125?

it doesn't crash at 100 and i'm able to oc to 1176 boost and 7000 on memory
    
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post #2386 of 3357
Quote:
Originally Posted by Orc Warlord View Post

Does higher memory OC affect the board at all?

My card runs heaven 4.0 at 1176/6800. I am going to try pushing it further but will playing games at such a high memory clock cause problems to the card?

You should see artifacts if the memorys are too high or voltage, in my experience i have not broken single memory in my lifetime. If it works that high then thats great smile.gif

Mine memory runs that 1745 and no problems and i have seen higher scores too, but core oc is the one that makes the difference.
post #2387 of 3357
Quote:
Originally Posted by DARKKi View Post

You should see artifacts if the memorys are too high or voltage, in my experience i have not broken single memory in my lifetime. If it works that high then thats great smile.gif

Mine memory runs that 1745 and no problems and i have seen higher scores too, but core oc is the one that makes the difference.

Depends on the game, a lot of games strongly favour a high memory clock.
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post #2388 of 3357
Quote:
Originally Posted by Tom Brohanks View Post

Just wanted to chime in and mention that there was a thread, I believe on Anandtech, where someone proved this out with an AMD card. When at a certain memory speed, the FPS would drop/artifacts. When set higher, the problem goes away. I'll try to find it.

Edit: Just skimmed first 12 pages of forum and didn't find the thread. I know it existed though! I think there was a deadzone at 1300mhz then at 1400mhz performance shot up.

Hey mate, did you ever find that thread?
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post #2389 of 3357
Dunno if anyone has noticed but even at 99% load on Heaven 4.0 there are times that the GPU will reduce its clocks ( not hitting the 70c mark ) I tested my cards with the nvidia demo and it locks it to 1228 for the entire duration (30mins)
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post #2390 of 3357
Quote:
Originally Posted by EarlZ View Post

Dunno if anyone has noticed but even at 99% load on Heaven 4.0 there are times that the GPU will reduce its clocks ( not hitting the 70c mark ) I tested my cards with the nvidia demo and it locks it to 1228 for the entire duration (30mins)

mine doesnt do that on heaven
   
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