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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1776

post #17751 of 38701
My Gigabyte WF3 7950 has an ASIC of 58% frown.gif

It has F2 BIOS and stock volts on load are 1.088v for up to 1 GHz.

I'll be flashing to F3 BIOS this weekend and see how that goes with temps and OCing.
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post #17752 of 38701
Ya i personally believe ASIC quality has a big impact on the overclockability of a 7970, recently went through 4 cards - and with this small sample size these were my findings

1. XFX Core (Reference) 7970 - ASIC 87% - default voltage 1048mV, hit 1150mhz using reference at 1150mV 70C/65% fan speed, could do 1200mhz but needed 100% fan speed
2. Gigabyte Windforce OC - ASIC 76% - default voltage 1150mv, hit 1050mhz - temps stayed cool, but card was voltage locked. Insta-returned.
3. Asus Matrix Platinum - ASIC 67% - default voltage 1250mv, hit 1265mhz at 1300mV - temps 65C-70C, 60% fan speed on Fan 1 & 2. Could probably hit 1300mhz on 100% fan speed. I believe this core was carried by the awesome matrix pcb.
4. Asus Matrix Platinum - ASIC 60% - default voltage 1250mv, would artifact at 1230mhz instantly same settings as above...i returned it immediately..probably stable at 1200mhz core

Ended up keeping 3, currently balancing core/temp/fan speed - probably going to settle on 1250@1280mV and 50% fan speed.
post #17753 of 38701
Nov 9, 2012 9:59 AM At local FedEx facility MADISON, AL
Nov 9, 2012 9:26 AM At local FedEx facility MADISON, AL Package not due for delivery
Nov 9, 2012 7:37 AM At local FedEx facility MADISON, AL

Darn you Fedex put the package on a truck and bring it to me! I need my water custom loop! Package is due for delivery lol.
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post #17754 of 38701
Quote:
Originally Posted by tsm106 View Post

If that were remotely true, then what... all the 80%+ cards would achieve what overclock and the 75% and less are incapable of... what overclock?
It's rubbish. I've been thru over a dozen and I only had one 80%+ card that went over 1300. The legend doesn't hold... it's random.

I agree with TSM. I have two Sapphires right now that won't clock beyond 1235MHz and both have ASIC's above 80...
post #17755 of 38701
ASIC Quality means nothing in terms of overclocking. At least it alone doesn't. There are a number of factors that play a role into overclocking.

Its not just the die, its the pcb, the components on it. How stable the power supply is. Temperature also all play roles. All cards are different due to a combination of those factors.
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post #17756 of 38701
Meh. Only thing I've noticed about ASIC is clocking on air vs water. I've had two cards above 80%, including my current card, and they both overclocked just as well on air as water. One card I had that was 70% saw a big improvement on water.
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post #17757 of 38701
Wish I had hung onto my 7970 Lightnings now. One of them clocked to 1275MHz on air. Would've loved to see it under water...
post #17758 of 38701
My ASIC is 75% an OCs decently on air. It seems to hit a wall at about 1200MHz, and requires huge voltage increases to get any higher.

Here is my most recent 3DMark11 run, I finally broke 12000 graphic score.

http://www.3dmark.com/3dm11/4889177

I'm running the 12.11 beta 4 drivers, 7970 at 1225/1750, 2500K at 4.6GHz, and RAM at 1600MHz in that run.

For 24/7, I run the same drivers, 7970 at 1100/1650, 2500K at 4.4GHz, and RAM at 1333MHz.
 
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post #17759 of 38701
Quote:
Originally Posted by Paztak View Post

My Shappire card ASIC is also 72% and 1150Mhz seems to be all what i can get out of the card, just like you. I will get texture flickering at higher clocks no matter how high i will push the voltage.
So, we are in the same boat. I haven't try to push mem that high what you have, maybe I should try that. But hey, it's like you said, card kicks ass in every game even at 1150Mhz.

yep thats what mine does over 1150 texture flicking or poping its not to bad but annoys me and you play long enugh the gpu will freeze drivers crash. Kinda funny at 1100mhz it run under stock volts i got it downclocked to 1.14 and was still stable.
Edited by Bal3Wolf - 11/9/12 at 9:41am
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post #17760 of 38701
edit: double post
Edited by Etizolam - 11/9/12 at 9:32am
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