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post #11 of 31
I just purchased an EVGA GTX 670 FTW a few days ago, and I just noticed that the card keeps crashing at certain overclocks despite the fact that its temperature is around 60° C, and its using under 1.175 V. Why is that? redface.gif
post #12 of 31
Thread Starter 
Quote:
Originally Posted by Alyan View Post

I just purchased an EVGA GTX 670 FTW a few days ago, and I just noticed that the card keeps crashing at certain overclocks despite the fact that its temperature is around 60° C, and its using under 1.175 V. Why is that? redface.gif

Um ... cause it can't overclock that high at the voltage it's running at?

Like I said above if your card doesn't hit 1.175V (talking about on a full gpu load, like a benchmark, when there's no framerate cap or v-sync or anything) then you can try maxing voltage in evga precision, that should make it hit 1.175V, and perhaps stabilize your OC better.

OC's don't typically fail due to temperatures, esp. not on these cards, which run pretty dang cool, and don't overvolt very high.
    
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post #13 of 31
Quote:
Originally Posted by brettjv View Post

Um ... cause it can't overclock that high at the voltage it's running at?
Like I said above if your card doesn't hit 1.175V (talking about on a full gpu load, like a benchmark, when there's no framerate cap or v-sync or anything) then you can try maxing voltage in evga precision, that should make it hit 1.175V, and perhaps stabilize your OC better.
OC's don't typically fail due to temperatures, esp. not on these cards, which run pretty dang cool, and don't overvolt very high.

What I meant to say is, I maxed out the voltage in EVGA Precision (at 1.175 V), but it only uses up to 1.162 V at 1250 MHz core clock and still crashes.
post #14 of 31
Thread Starter 
Okay, I get ya. Have you tried maxing out the Power Limit slider as well? If not, do that.
    
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post #15 of 31
Yup, it's maxed at 145%.

EDIT: Should I just exchange my card for another? It hasn't been 7 days since I purchased it.
Edited by Alyan - 6/27/12 at 3:12pm
post #16 of 31
1337 core clock tongue.gif
post #17 of 31
How is this different from my GTX 560 Ti 448 Cores downclocking itself at the desktop and then running at "real clocks" during games?
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post #18 of 31
Thread Starter 
Quote:
Originally Posted by Sprkd1 View Post

How is this different from my GTX 560 Ti 448 Cores downclocking itself at the desktop and then running at "real clocks" during games?

Have a look at this screenshot (again tongue.gif) and you'll discover Kepler OC'ing works very differently from your card.

286

Notice how the AB OSD shows my card running at 1337MHz? Now, look at GPU-Z ... do you see 1337MHz anywhere on the front? Nope, you don't. The highest core clock number you see is the current Boost Value, which is 1207MHz. The additional OC is 'dynamic overclocking' that Kepler does. I call this magical +130MHz discrepancy the 'Kepler Boost' value for my card. Every individual sample has it's own Kepler Boost value (although they're in steps of 13MHz, ranging from 0 to 235 based on reports on these boards), and this represents the MHz amount above the listed 'Boost' value (the one in GPU-Z) that your card will actually run at when under load. Fermi has no such dynamic overclocking ... your 3d clock is what you set it to, period.

Notice also that overclocking in Precision X no longer involves setting a specific clock like it does on your card, but rather, it involves an 'offset' value (+148 in my case here) instead.
Edited by brettjv - 6/28/12 at 11:27am
    
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post #19 of 31
Thanks. But what is the point of Kepler Boost? What's the point of having an overclock on top of an overclock?
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post #20 of 31
Thread Starter 
The point is that you get an automatic overclock w/o even having to actually overclock. And the amount that this auto-OC happens is based on an algorithm that's both chip-specific (asic quality and such) and condition-specific (temps, power draw, etc). Basically the Kepler chips are pretty dang variable as to how high of clocks they'll run. This auto-OC method nV deployed allows the cards that CAN run a lot faster ... to actually run a lot faster, without the user having to do the OC themselves.

If you're going to OC yourself anyways, then ... yes ... it's useless. Just like buying a pre-OC'd card is useless to an overclocker wink.gif
    
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