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post #161 of 1059
I would say to try working your way up slowly rather than jumping straight to +150mhz. There seems to be scaling issues with the card where higher offsets can actually produce lower fps. I'd start at +50mhz and work up in 10mhz increments while recording your results at each step. Then pick the OC which yields the best results...
post #162 of 1059
Thread Starter 
If your driver crashes (heaven crashes) then you need to restart your entire computer. This is why many people are claiming "I can do +170/+500 but its slower than +150/+500". I've tested it thoroughly and even resetting Precision does not fix it.

I can easily do +190/+500 in heaven stable for at least 5 loops after a driver crash. After I restart my computer heaven will crash instantly and I have to go back down to +135/+500. This is why i'm taking all these +155 to +200 results with a huge grain of salt. I'm looking at their FPS and it's low compare to mine, which leave me to believe they are not restarting their comp after each crash. Even though the card says it's being utilized to 100%, it is not.

Look at FPS in heaven, crash driver, then look at it again. It will be 5-10FPS lower until you restart. Not a full load on the card = unstable overclocks become stable.

I will be adding this to the OP in hopes to get more accurate overclocking results. This is also why we keep hearing people saying "lowering the TDP results in better overclocking" and "keeping the fan above 65% results in better overclocking". It's because there driver crashes prior to changing it, so they assume (like I did) that the change improved overclocking.
Edited by Murlocke - 3/24/12 at 5:38pm
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post #163 of 1059
I got 63.9 FPS in Heaven at 140/600 so this is just what I stick with. (Tested multiple times after restarting computer too).

644
Edited by haticK - 3/24/12 at 6:41pm
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post #164 of 1059
Quote:
Originally Posted by Murlocke View Post

If your driver crashes (heaven crashes) then you need to restart your entire computer. This is why many people are claiming "I can do +170/+500 but its slower than +150/+500". I've tested it thoroughly and even resetting Precision does not fix it.
I can easily do +190/+500 in heaven stable for at least 5 loops after a driver crash. After I restart my computer heaven will crash instantly and I have to go back down to +135/+500. This is why i'm taking all these +155 to +200 results with a huge grain of salt. I'm looking at their FPS and it's low compare to mine, which leave me to believe they are not restarting their comp after each crash. Even though the card says it's being utilized to 100%, it is not.
Look at FPS in heaven, crash driver, then look at it again. It will be 5-10FPS lower until you restart. Not a full load on the card = unstable overclocks become stable.
I will be adding this to the OP in hopes to get more accurate overclocking results. This is also why we keep hearing people saying "lowering the TDP results in better overclocking" and "keeping the fan above 65% results in better overclocking". It's because there driver crashes prior to changing it, so they assume (like I did) that the change improved overclocking.

This is really good information I hope people are paying attention. The 680 seems like a strange card I wonder what exactly is going on inside it after a driver crash? I'd guess it has something to do with the turbo boost but that is just a shot in the dark from me.
    
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post #165 of 1059
Thread Starter 
Quote:
Originally Posted by haticK View Post

I got 63.9 FPS in Heaven at 140/600 so this is just what I stick with. (Tested multiple times after restarting computer too).
644

Would you mind having heaven loop for about 30-40 minutes? I'm really debating on exchanging my card.

Have not seen another person have to do 135 core and 500 ram. I can do the benchmark at 150, but it wont be stable if I just leave heaven running for 30-40 minutes in non-benchmark mode. Even 140 crashes after about 32 minutes of that... even with +0 on the RAM.

Not a happy camper right now. frown.gif
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post #166 of 1059
Quote:
Originally Posted by Murlocke View Post

Would you mind having heaven loop for about 30-40 minutes? I'm really debating on exchanging my card.
Have not seen another person have to do 135 core and 500 ram. I can do the benchmark at 150, but it wont be stable if I just leave heaven running for 30-40 minutes in non-benchmark mode. Even 140 crashes after about 32 minutes of that... even with +0 on the RAM.
Not a happy camper right now. frown.gif

Sure, how do you make it loop, mine just stops once the results show up.
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post #167 of 1059
Quote:
Originally Posted by Murlocke View Post

If your driver crashes (heaven crashes) then you need to restart your entire computer. This is why many people are claiming "I can do +170/+500 but its slower than +150/+500". I've tested it thoroughly and even resetting Precision does not fix it.
I can easily do +190/+500 in heaven stable for at least 5 loops after a driver crash. After I restart my computer heaven will crash instantly and I have to go back down to +135/+500. This is why i'm taking all these +155 to +200 results with a huge grain of salt. I'm looking at their FPS and it's low compare to mine, which leave me to believe they are not restarting their comp after each crash. Even though the card says it's being utilized to 100%, it is not.
Look at FPS in heaven, crash driver, then look at it again. It will be 5-10FPS lower until you restart. Not a full load on the card = unstable overclocks become stable.
I will be adding this to the OP in hopes to get more accurate overclocking results. This is also why we keep hearing people saying "lowering the TDP results in better overclocking" and "keeping the fan above 65% results in better overclocking". It's because there driver crashes prior to changing it, so they assume (like I did) that the change improved overclocking.

Yes, the cards do not operate properly no matter what you do until you reboot. The max I can run Skyrim at in SLI is 120/350 for any length of time. Not sure if SLI is dragging my numbers down quite a bit versis single card but if I go over those settings one of the cards will drop down to default and the game almost crashes.

I have found Skyrim at 2560x1600, everything maxed, 8x MSAA, 16 AF, Ultra settings, FXAA, hi-res texture pack loaded will crash my SLI setup way before Heaven or any other game. Although the FPS is still very impressive, I get 100-150 FPS with these settings running around the world.

Amazingly when the VRAM counter states 2100 MB used I don't get any slowdowns.
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post #168 of 1059
Thread Starter 
Quote:
Originally Posted by haticK View Post

Sure, how do you make it loop, mine just stops once the results show up.

Just don't click benchmark. The program automatically loops the same stages as the benchmark over and over. Launch it and go AFK. smile.gif
Quote:
Originally Posted by CallsignVega View Post

Yes, the cards do not operate properly no matter what you do until you reboot. The max I can run Skyrim at in SLI is 120/350 for any length of time. Not sure if SLI is dragging my numbers down quite a bit versis single card but if I go over those settings one of the cards will drop down to default and the game almost crashes.
I have found Skyrim at 2560x1600, everything maxed, 8x MSAA, 16 AF, Ultra settings, FXAA, hi-res texture pack loaded will crash my SLI setup way before Heaven or any other game. Although the FPS is still very impressive, I get 100-150 FPS with these settings running around the world.
Amazingly when the VRAM counter states 2100 MB used I don't get any slowdowns.

You could always test them one at a time. I really hope this is driver related...

You must be pretty mad going from 4x 7970s to 4x 680s... until we get voltage control 7970s are superior.
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post #169 of 1059
Ended up crashing, not sure exactly when. Played BF3 a lot today with these settings and didn't have any problem so not sure if I should bother changing them.
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post #170 of 1059
If you guys run Unigine Heaven 3.0 please make sure it's all maxed (1920x1080 AAx8 AFx16 Tesselation Extreme) so that we can all compare oranges to oranges. biggrin.gif

So far it looks like +175MHz Core (+500MHz Memory havent tried further) is my limit, about 17% performance boost on stock volts, not bad at all. thumb.gif
    
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