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[Official] MSI GTX 680 Lightning Owners Club - Page 219

post #2181 of 7827
Quote:
Originally Posted by famich View Post

Tried another 3DM 11 at submax voltage- it seems that my chip is sensitive to the temperature, during the run the temp rose to 90+C..
might really nedd the watercooling or at least to change the TIM !
thumb-i191140b6q78y.jpg

90c? There is something wrong with your card. At max voltage with 100% fan I never pass 60c.
    
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post #2182 of 7827
Quote:
Originally Posted by famich View Post

Tried another 3DM 11 at submax voltage- it seems that my chip is sensitive to the temperature, during the run the temp rose to 90+C..
might really nedd the watercooling or at least to change the TIM !
thumb-i191140b6q78y.jpg
'

Dude, are you using auto fan or something...IF you're doing over voltage you NEED manual fan!'

edit: just saw your pic with 100% fan, dunno. Something is wrong or the air flow in your case is really horrible. What voltage are you running? Is this with the hex edit? Don't mess with that hex edit garbage unless you're using real water cooling, your card shouldn't get that hot with max manual fans. It will get hot with maxed out voltage let there be no question but I don't think it would be 90C.

Either way you shouldn't be running that voltage 24/7 anyway
post #2183 of 7827
So last night after an hour of benching at 16c ambient, my Lightning was giving artifacts and froze at a completely stable clock in 3dmark11 =/
rebooted and all worked fine after, no more artifacts.

Strange
    
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post #2184 of 7827
Quote:
Originally Posted by Scorpion667 View Post

This is all I could get for tonight... I found for my sample, after 1390Mhz, lowering PLL by 50mv was the only way to go higher else it would crash instantly.

1395/7258
+93mv gpu
+20mv mem
-50mv pll
ambients ~16c
Oh well

I'm always up for some suicide runs biggrin.gif Just waiting for my room to cool down too.
So you got a higher clock by lowering the Aux voltage 50mv?? I must admit that's definitely something I never tried. Did it lower temps enough to make that difference? I would think the lower voltage would cancel out the benefit of the few degrees lower temp and not help much. But yeah I'll have to try that. Interesting...

Quote:
Originally Posted by famich View Post

Tried another 3DM 11 at submax voltage- it seems that my chip is sensitive to the temperature, during the run the temp rose to 90+C..
might really nedd the watercooling or at least to change the TIM !
thumb-i191140b6q78y.jpg

Holy hell! Replace TIM immediately or if you don't want to mess with doing that then send it back. Judging from how my temps have been, I don't think I'd hit 90C at 100% fan speed until I up the voltage close to +180mv. That sucks though because that's quite a good chip if it can hit 1411mhz when going all the way up to 90C. I'd change the TIM and try to keep that one wink.gif
Edited by dph314 - 8/14/12 at 4:44pm
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post #2185 of 7827
Quote:
Originally Posted by dph314 View Post

I'm always up for some suicide runs biggrin.gif Just waiting for my room to cool down too.
So you got a higher clock by lowering the Aux voltage 50mv?? I must admit that's definitely something I never tried. Did it lower temps enough to make that difference? I would think the lower voltage would cancel out the benefit of the few degrees lower temp and not help much. But yeah I'll have to try that. Interesting...

Well it yielded an extra 5Mhz above 1390Mhz where as before lowering PLL anything above 1390 would crash on the first test in 3dmark11 consistently. However due to the small gain, I wouldn't rule out my room getting colder as the AC was blasting so it may be a false result. But it didn't lower my OC potential so it's worth trying. Give it a shot and let me know how it goes =P

I got the idea from my 2500k actually, lowering CPU PLL allowed me to lower vcore a little bit. Not by much tho, 0.012 I think it was. Depends on the individual chip, some like lower, some like higher...
Edited by Scorpion667 - 8/14/12 at 8:31pm
    
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post #2186 of 7827
Quote:
Originally Posted by Scorpion667 View Post

Well it yielded an extra 5Mhz above 1390Mhz where as before lowering PLL anything above 1390 would crash on the first test in 3dmark11 consistently. However due to the small gain, I wouldn't rule out my room getting colder as the AC was blasting so it may be a false result. But it didn't lower my OC potential so it's worth trying. Give it a shot and let me know how it goes =P
I got the idea from my 2500k actually, lowering CPU PLL allowed me to lower voltage a little bit. Not by much tho, 0.012 I think it was. Depends on the individual chip, some like lower, some like higher...

I'll be damned. My max with vanilla 2.2.3 was 1430/7000 (all voltages maxed). I tried 1435/7000 with Core and Memory voltages maxed, but PLL at +0mv, and it crashed like it did when I was originally testing. Then...I tried 1435/7000 with Core and Mem maxed again but PLL at -50mv, and wouldn't ya know, it passed. Going to try 1440 now. But yeah temps were the same for me. Like exactly the same, max of 61C both times.
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post #2187 of 7827
Thread Starter 
Quote:
Originally Posted by Scorpion667 View Post

This is all I could get for tonight... I found for my sample, after 1390Mhz, lowering PLL by 50mv was the only way to go higher else it would crash instantly.

1395/7258
+93mv gpu
+20mv mem
-50mv pll
ambients ~16c
Oh well

dude this is worse than the OC you already have in the spreadsheet? is your card not performing as well as it used to or something? Well, actually your memory oc is a little better but core OC is down by 50mhz...
do you want me to put this data into the sheet?
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post #2188 of 7827
Quote:
Originally Posted by michaelrw View Post

dude this is worse than the OC you already have in the spreadsheet? is your card not performing as well as it used to or something? Well, actually your memory oc is a little better but core OC is down by 50mhz...
do you want me to put this data into the sheet?

Looks like 1388 in spreadsheet --> 1395 new max.
    
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post #2189 of 7827
xoleras, you're not up there? I thought you had already posted a validation or two? Just wondering because I checked the sheet to look for what your cards did individually. I know you got a killer SLI overclock/score, but I can't remember what the cards did solo and I was curious. Didn't feel like searching through all the pages.
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post #2190 of 7827
Here's a shot of mine at 1386 core/3479 mem in 3D Mark 11, and that wasn't even my best 3DM11 score. I ran the same clocks when I did my best Heaven run of 124.3, but no AB screenshot.

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