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~~The GTX 670 Overclocking Master-Guide~~ - Page 35

post #341 of 3357
Quote:
Originally Posted by FightCat View Post

Below is my fan curve.
557
Please tell me, is my idle GPU temp (38C now) too much ? If the ambient temp affecting it was the case, it should have a constant effect, shouldn't it ?
Event hough you have it set at 20%, doesnt it only go as low as 30%?
post #342 of 3357
I am currently overclocking my SLI 670s. I am doing it linked together. Is this the correct way? Uniengine does not bring my cards' usage to 99%, more like 97/98%.
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post #343 of 3357
Here is what I got:

Stock:
GPU1: 1137/3105
GPU2: 1175/3105

Benchmark:
700

Overclock:

GPU1: 1215/3649
GPU2: 1256/3649

Benchmark:
700

EDIT: I updated to the beta driver, and although I had to reduce clock a bit less, it seems more stable now.

1202/3645. 1246/3645
700
Edited by greg1184 - 7/7/12 at 12:50pm
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post #344 of 3357
Quote:
Originally Posted by LostRib View Post

Event hough you have it set at 20%, doesnt it only go as low as 30%?

Sorry ?
post #345 of 3357
Quote:
Originally Posted by greg1184 View Post

I am currently overclocking my SLI 670s. I am doing it linked together. Is this the correct way? Uniengine does not bring my cards' usage to 99%, more like 97/98%.

I'm interested in the answer here too.

I just left mine linked, but I could see how clocking one a tiny bit higher might help some.
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post #346 of 3357
Quote:
Originally Posted by bigal1542 View Post

I'm interested in the answer here too.
I just left mine linked, but I could see how clocking one a tiny bit higher might help some.

Honestly, unless you are benchmarking, it won't make that big of a difference. I clocked down a little bit after I downloaded the beta driver and it didnt make a big difference in performance.... it is more stable, though.
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post #347 of 3357
I'm having some hard times overclocking my evga 670 4Gb, mostly because of temperature exceeding the 70°c in few seconds after the benchmark starts. So, before any other conclusion, may I ask you if this is a "normal" behaviour? I'm talking about the GPU usage ofc, being completely idle, nothing but PrecisionX running. Beta drivers, vsync off.

396
post #348 of 3357
Thread Starter 
Quote:
Originally Posted by johnnystuff View Post

I'm having some hard times overclocking my evga 670 4Gb, mostly because of temperature exceeding the 70°c in few seconds after the benchmark starts. So, before any other conclusion, may I ask you if this is a "normal" behaviour? I'm talking about the GPU usage ofc, being completely idle, nothing but PrecisionX running. Beta drivers, vsync off.
396
That definitely doesn't look normal. It should be at 0% gpu usage constantly if you indeed have nothing else open. Try restarting your computer and then check it again and see if it flat-lines at 0%.

Also, it's not that important to stay below 70C. You'll be throttled by only 13MHz by going over 70C (and an additional 13MHz if you go over 79C), so it's not a big deal. Try taking the side off your case for a Heaven run and check if temperatures drop. If they do, then your cases airflow is most likely the issue. If you want to try to improve temperatures, post your case model, how many fans it has, their location and the direction they're blowing.
post #349 of 3357
Thread Starter 
Quote:
Originally Posted by greg1184 View Post

I am currently overclocking my SLI 670s. I am doing it linked together. Is this the correct way? Uniengine does not bring my cards' usage to 99%, more like 97/98%.

You can unlink them and overclock each card separately. This will net you a little more performance but it will take about twice as much time. Just be sure you keep the card you aren't testing at stock clocks so you don't get a bunch of false-positives when testing the second.

For example
GPU1 = overclock testing
GPU2 = stock speed
Find GPU1 max stable clock and write it down

GPU1 = stock speed
GPU2=overclock testing
Find GPU2 max stable clock and write it down

Now set GPU1 to max overclock
Now set GPU2 to max overclock

You might also want to consider switching the better performing card to your first (top) PCI slot, as the top card does a little more work than the bottom one (this will equate to pretty insignificant FPS gains though, but if you're in to min/maxing, might as well tongue.gif)
post #350 of 3357
Hey guys. I have a question. I've been following this guide, working on the boost clock part so far and I hit the point of failure about +60 mHz in. So naturally, I went down 5 mHz each time, only to have it fail each time. Eventually, I reverted back to the stable +40 mHz setting, just to try it out again, and to my surprise, it also failed.

I don't understand why this is happening. Everytime the benchmark failed, I've tried reinstalling drivers manually, restarting the computer, and running the benchmark with stock settings and then running the benchmark again with the new settings. I also remembered to maximize the voltage each time I start up Precision. Sometimes the old settings fail and sometimes it doesn't so I don't really have any clue what settings are stable and what are not. Any tips?
Edited by Admiral Mudkipz - 7/8/12 at 1:53pm
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