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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1399

post #13981 of 38704
Quote:
Originally Posted by pioneerisloud View Post

All 7900 series cards are unlocked voltage, except the DC II.

Cool, how well do the lightnings overclock on air?
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post #13982 of 38704
HD 7950DCII are unlocked.
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post #13983 of 38704
Quote:
Originally Posted by MACH1NE View Post

Cool, how well do the lightnings overclock on air?

Depends on the card, like everything. They aren't cherrypicked chips. Mine did 1200/1600 with 1.225v
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post #13984 of 38704
My Lightning OC is 1250/1600 @1,281v+20pw and 1,600v for memory
Edited by xNAPx - 7/30/12 at 6:34am
post #13985 of 38704
I've had two 7970 Lightnings. One did 1275MHz on air and the other did 1215MHz. As far as I can tell they really didn't perform any better than reference on air but may have a bit higher headroom under water...
post #13986 of 38704
Quote:
Originally Posted by Majin SSJ Eric View Post

I've had two 7970 Lightnings. One did 1275MHz on air and the other did 1215MHz. As far as I can tell they really didn't perform any better than reference on air but may have a bit higher headroom under water...
which are your voltages for both on vcore?
post #13987 of 38704
Hi! Got my hd 7970 a few days ago and I'm having an issue but I'm not sure if the GPU causes it or not. This is a completely new rig so haven't tried any other GPUS. The problem is my computer randomly crashes to a blue screen that isn't a BSOD, it is just a light blue color all over the screen. This has happened twice and both were at low load. I haven't overclocked my gpu at all yet. The exact card I have is Sapphire HD 7970 OC edition and I am running the 2nd bios with 1ghz clocks. I am using the 12.6 drivers.
     
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post #13988 of 38704
I'm also joining the club guys! Bought my TF3 7950 from Fry's the other day. They were selling it for $409.99 ($438 with tax) but I did a price match to amazon and got it for $329.99 ($353 with tax LOL) and I still have a $20 rebate to mail in hah. The manager of the department was pretty pissed that they were selling it for more than a hundred bucks than Amazon and Newegg haha.

Set it up and it is running great! Have it going 1100/1300 with my vcore at 1075mV. I have a question though. Is there any way I could push it past 1100mhz? Afterburner caps it at 1100 and every time I try to use the unofficial overclocking module, the settings stop sticking and just keep reverting back to zero on everything.
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post #13989 of 38704
Quote:
Originally Posted by Ukkooh View Post

Hi! Got my hd 7970 a few days ago and I'm having an issue but I'm not sure if the GPU causes it or not. This is a completely new rig so haven't tried any other GPUS. The problem is my computer randomly crashes to a blue screen that isn't a BSOD, it is just a light blue color all over the screen. This has happened twice and both were at low load. I haven't overclocked my gpu at all yet. The exact card I have is Sapphire HD 7970 OC edition and I am running the 2nd bios with 1ghz clocks. I am using the 12.6 drivers.

heat problem perhaps?

is it blue lines across the screen?
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post #13990 of 38704
Quote:
Originally Posted by Ukkooh View Post

Hi! Got my hd 7970 a few days ago and I'm having an issue but I'm not sure if the GPU causes it or not. This is a completely new rig so haven't tried any other GPUS. The problem is my computer randomly crashes to a blue screen that isn't a BSOD, it is just a light blue color all over the screen. This has happened twice and both were at low load. I haven't overclocked my gpu at all yet. The exact card I have is Sapphire HD 7970 OC edition and I am running the 2nd bios with 1ghz clocks. I am using the 12.6 drivers.

This problem sounds similar to the problem I had. Are you using Firefox? I had 3 grey/green screen of death with vertical lines while browsing online when using the 12.7 betas.

Try the new July 19th Unofficial Betas as they seem to have fixed the problem for me.

http://forums.guru3d.com/showthread.php?t=366295
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