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Need a little help with overclocking my GTX 680

post #1 of 14
Thread Starter 
Hey everyone, I once again come to this forum to ask for help on OC'ing. I decided yesterday to OC my EVGA GTX 680 (specifically this one ).

I read about it, did a little bit of research, and from what I gathered was that I was to initially set my Power Target to max, 132%, and eventually reduce if I did not see my actual power usage being that high after the OC.

Either way, I set it to 132% initially, and started off with a +100 GPU Clock Offset, and +250 Mem Clock Offset, and clicked Apply. These values, what I thought was low compared to some other numbers I saw from other people, seems to crash the GPU every time.

I wanted to go ahead and try reducing/increasing numbers but I wanted to first check with you guys for anything that I may be doing incorrectly or that I am missing here. Also, does the driver crashing (if I keep testing different numbers) mean it could damage my card as I'm doing this or is there anything wrong with it crashing till I get a stable OC?

Thanks for all the help, in advance.
post #2 of 14
Here is the thread to follow, it says 670 but is works for the 680 too:
http://www.overclock.net/t/1265110/the-gtx-670-overclocking-master-guide

Driver crashes should not hurt your card, but you may want to restart the machine before you next test to make sure it is working properly. I like to use Valley 1.0 to test, I look at the fps in the first scene with any new oc I try. If the fps is not the same or higher than my last good run, I know something is wrong in a matter of seconds.

Can you card pass any stability tests at no overclock, just with the power % raised?
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post #3 of 14
Thread Starter 
Quote:
Originally Posted by justanoldman View Post

Here is the thread to follow, it says 670 but is works for the 680 too:
http://www.overclock.net/t/1265110/the-gtx-670-overclocking-master-guide

Driver crashes should not hurt your card, but you may want to restart the machine before you next test to make sure it is working properly. I like to use Valley 1.0 to test, I look at the fps in the first scene with any new oc I try. If the fps is not the same or higher than my last good run, I know something is wrong in a matter of seconds.

Can you card pass any stability tests at no overclock, just with the power % raised?

Thanks, I will look into the guide and try Valley instead.

Also, which stability test should I use for that?
post #4 of 14
If you can go several passes of Valley and Heaven 4.0 (not the old 3.0) and 3dmark then you know you are close. Playing games for hours is the real test, I have heard that Far Cry 3 is an oc killer, so you can have one level oc for benchmarking, a little lower for most games, and even a bit lower for really stressing games. It all depends on your particular setup and what games you play with which settings you choose to play them.
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post #5 of 14
Quote:
Originally Posted by eXultanCe View Post

Thanks, I will look into the guide and try Valley instead.

Also, which stability test should I use for that?

Devil May Cry 4
Lost Planet 2
Resident Evil 5 and 6
Sniper Elite V2
Street Fighter IV
HAWX 2

All those have benchmark test you can download for free
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post #6 of 14
Thread Starter 
Alright, thanks guys.

What about voltage increasing? The guide you sent me told me to increase voltage to maximum, but I've seen other people say to not increase voltage at all.
post #7 of 14
Quote:
Originally Posted by eXultanCe View Post

Alright, thanks guys.

What about voltage increasing? The guide you sent me told me to increase voltage to maximum, but I've seen other people say to not increase voltage at all.
My card crashes if i touch the voltage even a little
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post #8 of 14
Thread Starter 
Okay, I left voltage as is.

So far, from my tests, it seems my GPU clock offset higher than 75 will crash, which seems super low.
I got Mem Clock Offset at +525, after that there is a huge drop in FPS on my benchmarks.

I might settle for +75 GPU, +525 MEM, but I am extremely sad about the low GPU.
post #9 of 14
What's the actual clock speed (in Precision or Afterburner under load)? The offset doesn't really tell you anything, since each card's boost is different. So +75 for you could be the same as +150 for someone else.
post #10 of 14
Thread Starter 
Okay, this is what I got with no tests running, but I assume it shows the max. http://i.imgur.com/j6VeA3e.png

I was doing a Unigine test right now and the test crashed mid way, this is what the Precision X graphs showed http://i.imgur.com/2WIQl1F.png (notice the 305% TDP when crash happens). Is that normal? Also, microphone stopped working after that. Really weird.
Edited by eXultanCe - 4/2/13 at 9:13pm
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