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~~The GTX 670 Overclocking Master-Guide~~ - Page 224

post #2231 of 3357
Quote:
Originally Posted by Forceman View Post

You sometimes get weird power readings when the driver crashes - I think the 300% thing is a symptom, not the cause. Sounds like you just aren't stable at that clock speed.

Well the odd thing is, power% limit isn't that high previously, within 100~106%
And when I push the clock speed higher, it doesn't happen that often.
But most stable on my gtx 670
0% Power limit(Set to 150% in bio)
Most stable - 145 clock, 600 Memory
SOmetime get the 300% powerlimit, then crash
165mhz clock, 700 memory.
But if between 146~164 clock, it crashes very often.
post #2232 of 3357
It's just unstable at those clock speeds. It is impossible to get to 300% power without hard-modding the card (even with a BIOS mod), so there is no way the software reading is accurate.
post #2233 of 3357
Getting some major all over the place throttling on my 670 FTW. Upping the voltage does not seem to help either. My card does not up the voltage by itself under load either, isn't it supposed to?
Edit: oops I forgot to offest the power target bar. doh.gif
Anyone know the max safe temp region?
Edited by JTHMfreak - 4/4/13 at 4:30pm
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post #2234 of 3357
No, thats an unstable OC. I get the same when your driver crashes your TDP jumps to odd numbers for me its usually 261%.
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post #2235 of 3357
Quote:
Originally Posted by JTHMfreak View Post

Anyone know the max safe temp region?

The cards throttle at 70C (and again at 80C), so try to keep it under that. It's safe a lot higher, but no sense throttling if you can avoid it.
post #2236 of 3357
Quote:
Originally Posted by bluewr View Post

I modded my bios, with the 150% Power limit, etc.
But I'm getting odd error, in which when I run heaven/Valley or Guru3d, sometime it'll clear fine, other time it'll crash, because the power limiter jumped to 300%
Is this because of bios or other problem?
Had that problem too = too high clocks set, that was issue for me. Lowered them and it stopped.
post #2237 of 3357
Quote:
Originally Posted by Forceman View Post

The cards throttle at 70C (and again at 80C), so try to keep it under that. It's safe a lot higher, but no sense throttling if you can avoid it.

I realize and know that, but what is the temp that starts to deteriorate the cards?
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post #2238 of 3357
Quote:
Originally Posted by JTHMfreak View Post

I realize and know that, but what is the temp that starts to deteriorate the cards?

I don't think anyone knows, at least not for sure, anymore than anyone knows the temperature a CPU starts to degrade. It's always degrading, it's just a matter of degree.

I'd keep it under 80C, but that's just a number I pulled out of my you-know-where. Some people say Kepler is prone to degradation and that's why Nvidia limited the voltage so much, so I'd err on the lower-temperature side.
post #2239 of 3357
Quote:
Originally Posted by xonare View Post

Had that problem too = too high clocks set, that was issue for me. Lowered them and it stopped.

Yep. Had the issue today. I had to cut 50mhz off my memory OC offset to get to 1333mhz core stable. Anything higher on the core crashes in Valley.
post #2240 of 3357
I'm wondering about the stability of my OC a bit as well. When I tested with various benchmarks the frequency stayed nice and steady under load.

Then, I decided to break in the cards with a classic: Crysis, maxxed to the gills. Game play seems just fine. I'm using adaptive v-sync and the image is great, neither a tear nor an artifact to speak of.

When I look at the Precision-X graphs after playing I see that temps are in the mid-to-upper 60s and TPD maxes at about 115%. So, everything seems to be under comfortable control.

But...

I do see the cards are occasionally throttling down. Usually just a step, but sometimes more. It doesn't seem to affect game play at all. Once in a while there's a pretty serious drop, but I am pretty sure that corresponds to times when I pause the game. Still, the little dips here and there bother me. Should they?

My GPU usage is rarely maxxed when playing the game; should I still see the line be nice and flat? Or is that normal if the game isn't being so demanding (OK, even six years on, that feels like a weird thing to say about Crysis lol)?

JML
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