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[Official] NVIDIA GTX 660TI Owners club - Page 171

post #1701 of 3665
AFAIK, only MSI PE can over volt higher than 1,175 cause the way they do it by adding on top . unless there are other models that do the same way. that is only way to bypass Nvidia limit on voltage software wise . you have to unlock bios by raising the 1.150 to 1.187 ,which will boost to then 1.212v
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post #1702 of 3665
Quote:
Originally Posted by Edkiefer View Post

AFAIK, only MSI PE can over volt higher than 1,175 cause the way they do it by adding on top . unless there are other models that do the same way. that is only way to bypass Nvidia limit on voltage software wise . you have to unlock bios by raising the 1.150 to 1.187 ,which will boost to then 1.212v

Aha, i tried unlocking bios but it ended up unstable. I had the 150% PL ans 1.212v but as soon as i ran 3d application artifacts all over the screen, had to restart. So it seems i"M left with the stock OCpossibilities. GPU seems to be stable at 1.215mhz boost clock. Is that normal for a 660ti?
post #1703 of 3665
Quote:
Originally Posted by athlon 64 View Post

Aha, i tried unlocking bios but it ended up unstable. I had the 150% PL ans 1.212v but as soon as i ran 3d application artifacts all over the screen, had to restart. So it seems i"M left with the stock OCpossibilities. GPU seems to be stable at 1.215mhz boost clock. Is that normal for a 660ti?

I am not expert, haven't flashed mine but artifacts normally would look at memory speed .

What I would do on unlocking is first find max stable clock at stock voltages, then set that value or one step below as the max clock setting in bios .

Then just use AB or Precession to adjust your core clocks and mem clocks . It is much easier to set them in software then trying to get max ones right in bios .

Plus you probably want to make up a fan profile as the bios fan limits are limited to what it produces .


Edit: you could used a - offset value in core clocks to lower max clock with unlock bios too , unless you tried that already .
Edited by Edkiefer - 3/20/13 at 5:55am
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post #1704 of 3665
Quote:
Originally Posted by Mephic View Post

Edkiefer - it goes to 105% and sometimes throttles sometimes not.

Got my memory fully stable on 7400 effective!

The most I can get valley to at 1600x1200 is 80% .
now if I set power level to 84 it will just start to throttle at 4% below slider , So extrapolating to 100% would be 96% would just start with slider to 100% . not sure if same % above 100 but would work out to 109% with slider on 114% if its working .
So your seeing above 100% so I would say it is working, just maybe not what/how we would want .
Edited by Edkiefer - 3/19/13 at 4:11pm
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post #1705 of 3665
Yes- maybe it is, because sometimes at 105% it doesn't throttle. It is a matter of a certain spot in benchmark.

Anyway - In Far Cry 3 at 4xAA, 1080p, everything on Ultra and view range maxed out I get 100% power usage but it NEVER clocks down from my 1333 MHz on core.

That way I am getting 45 FPS stable which is great outcome, considering the fact, that in reviews this card got 45 but with AA turned off.

I love this gpu!

And my temps never pass 55 degrees.

So my final settings in afterburner are:

+50 mv
+114% power target
+110 Core (but here it depends on what Your boost is so don't set it straight away)
+700 Memory

Which gives me:

Core with kepler boost: 1333 MHz
Memory effective: 7400 MHz

3583 GFlops
31992 MPix/s
149296 MTex/s
111972 MVts/s
177.8 GB/s (!!! - almost as good as gtx 670 although it has wider mem bandwidth)

So these performance values in GTX 680 STOCK looks like that:

3090 GFlops
32192 MPix/s
128768 MTex/s
96576 MVts/s
192.3 GB/s

Basically I gave myself GTX 680 performance (need some more memory tweaking) but saved up loads of $.

I am happy indeed smile.gif

One more interesting thing about throttling - it happens only in 3dmark11. I tried 6 different heavy GPU games - card never throttles even at 100-105%. Guess it's 3dmark mess up. But I don't play benchmarks, I play games so I don't care wink.gif

Also I tried OCing my core to the max:

At +100MV I got myself almost 1400 MHz Kepler Boost clock. But I'm affraid of running on such high overvoltage.
Edited by Mephic - 3/20/13 at 2:52am
post #1706 of 3665
Thats impressive on memory 7400 , is that w/o mem volt's upped .

I wouldn't be surprised if the drivers are doing something in the heavy BM games (the throttling) as a self destruct thing .

I have never tried going above 450+ on mem .

Yes, Fc3 runs great for me, I don't run with AA though but fps are in the 60-75 range, I think I have everything ultra except FX down one step and using SSAO on shadows, don't like looks of HBAO .
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post #1707 of 3665
Nope, I didn't up memory voltage.

Biggest memory Overclock which I saw was 7700 MHz.

And I want to beat it smile.gif
post #1708 of 3665
Thread Starter 
Quote:
Originally Posted by Mephic View Post


Basically I gave myself GTX 680 performance (need some more memory tweaking) but saved up loads of $.

I can agree with that if you manage to hit 55FPS on Unigine 3.0 wink.gif
post #1709 of 3665
WOW. i just tried to unlock my gigabyte 660ti again and did it succesfully this time. So with the 150% tdp and 1.212v voltage gpu clock didn"t go much more, only 20mhz over the max clock withouth unlocking.
But the memory. So before unlocking she couldn"t do over +280 in AB. NOW SHE IS STABLE AT +600. That is 7.2Ghz effective. I just played crysis 3 and it flies. Card reaches 130% tdp max. Temperature 72C max. So voltage is 1.212.
Very happy. I just wanted to ask, is it safe to run this voltage when gaming? I think my gigabyte OC 660ti has improved regulation but i still wanted to ask.
post #1710 of 3665
Tong: maximum settings?
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