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I'm confused about the new gtx680 I got today

post #1 of 28
Thread Starter 
I'm attempting overclock the evga gtx 680 ftw+ 4gb model I just received. Max boost is at 1176 at 100% or 131%. It's stable at 100% power and +100mhz offset on gpu, but not at same offset with target power bumped up to 131%?

Still though if 100mhz is all I can get out of this ftw card I might look into some other options

I also have a evga 670 sc 4gb model I'm playing around w and the 680 ftw runs much cooler. 6-8 degrees Celsius

Edit this is my first Kepler card. I had no idea they were this different.
Edited by brkbeatjunkie - 4/2/13 at 4:19pm
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post #2 of 28
So if you increase power target to 137% your 100MHz offset is no longer stable?

If so it may be that your card is boosting higher, since you increased the power ceiling, the card may boost higher.
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post #3 of 28
Thread Starter 
I've got the ftw model that goes to 131%

In both scenarios the gpuz shows the max gpu clock the same on each test


Edit: this is at 1.15v

The test did not compete at stock voltage in either test
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post #4 of 28
So 100% power and +100 on the gpu is stable, but 131% power and +100 on the gpu is not stable?

Have you tried say 110% on power and +120 on the gpu?

131% power might be to much voltage.
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post #5 of 28
Thread Starter 
Btw I'm restarting after every crash and fan is set to 75%

Crashes at 125 MHz at 100% power and 1.15v

Crashes at 100mhz offset and 110% power

Is 100 MHz offset low for this card?

Edit again: 110 offset at 100% power crashes benchmark at 1.15v, max boost clock recorded 1267mhz there
Edited by brkbeatjunkie - 4/2/13 at 5:07pm
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post #6 of 28
Use Precision or Afterburner to watch the core clock speed while you are testing - GPU-z doesn't always show the actual boost speed. What are the Precision/Afterburner reported clock speeds, posting the offsets doesn't help since each card boosts differently. When you increase the power limit the cards sometimes will boost higher automatically, so your +100 offset is getting added to a higher boost clock, which could be too high for stability.
post #7 of 28
Thread Starter 
Both precision and gpuz state a max clock of 1257mhz at 100% power, 100mhz offset, and 1.15v, which is the highest OC I've got from mixing the sliders like a dj wizard

Actually I tested 50mhz offset and 115% power at 1.15v and that worked a whole ago, retesting now to see what results that gives

I'm a Kepler noob
Edited by brkbeatjunkie - 4/2/13 at 5:13pm
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post #8 of 28
What do they show for the clock speed with 131% power? If they aren't boosting differently there really isn't any reason why it wuold be stable at 100% and not at 131%, so that's pretty strange. Have you tried using Precision to set the +100mv on the voltage control?
post #9 of 28
Thread Starter 
You know what else? The package came from the east coast, to the west coast and back to the east coast where I live, it arrived all tore up and no packing air on the inside box from amazon!! Those heathens!
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post #10 of 28
Thread Starter 
That was a strange thing too

At stock clocks and stock voltage, 100 and 131% showed a max stock boost of 1176mhz
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