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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1403

post #14021 of 38701
Quote:
Originally Posted by Statius View Post


No way would releasing the power restrictions cause any issue to performance or stability..

 

ok was not sure. the thread i looked at he said 20% he had stuttering but once set at 0% and below it was gone. Just wondered.

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post #14022 of 38701
Quote:
Originally Posted by Statius View Post

My HD 6870's hated anything above 70C.
Iv'e never had my 7950 above 72C.
Mine is good too from temp point, but now its extremely hot in my country, over 40C some days, so its extremly hard to keep it below 70C on overclocked on auto fan, if i use custom its ok.
Edited by sena - 7/30/12 at 3:16pm
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post #14023 of 38701
Thread Starter 

The highest clock speed I could hit fully stable (not "oh I can play x game stable") is 1070 MHz for the core. 

At that clock speed, the card remains stable even at 95c. 

 

Tahiti seems to be very sensitive to temps when clocked above 1100 MHz. 

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post #14024 of 38701
I figured out that, that invisible temp wall appears when you overvolt, keep vots on def. and no temp limit.

Also for above discussion, for example: You have you card at 1100 MHz with 1.2V, and power tune limit at 0%, and you can play games and stuff, but if you look closely at MSI AB, you will see that in heavy games and benchs, you are actually not running at 1100 MHz, sometimes it can drop below stock HD 7950 clocks, its sound crazy, but its true. And then you raise powertune to 20%, and now you card is working on 1100 MHz in every game/bench, and bang you are not stable anymore, because now you card is working in its full capacity, as i explained before, to ensure full stability, you need to have that slider at 20%, to ensure there is no downclocking in any game or bench.
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post #14025 of 38701
Quote:
Originally Posted by k4sh View Post

Well, both RAM and GPU overclocked or not i get the same temps , around 74°C benching and the GPU oc only it's is ok for at least 1 hour.
So i dunno what to think.
I will remove the die covering plate to put my universal WB on it. Temps will not be a problem anymore.
i dont understand why you guy's 7970's heat runs so high,where do you live? what cases do you have at what fan speeds are you cards running at load?

i have a reference club3d 7970 that dont see 65 degrees under load....i have a fan curve with msi and using a HAF-X
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post #14026 of 38701
Thread Starter 

I keep it at +20% all the time.

OCCT and FurMark are actually throttled even at +20%.

The only way around that would be to disable PowerPlay.

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post #14027 of 38701
Quote:
Originally Posted by Evil Penguin View Post

I keep it at +20% all the time.
OCCT and FurMark are actually throttled even at +20%.
The only way around that would be to disable PowerPlay.
i got a lot of errors in occt but every game or bench is just fine, i don't see any artifact and have any crash,
post #14028 of 38701
Thread Starter 
Quote:
Originally Posted by xNAPx View Post

i got a lot of errors in occt but every game or bench is just fine, i don't see any artifact and have any crash,

I can tell you that they are not false-positives. wink.gif

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post #14029 of 38701
Quote:
Originally Posted by LordByron View Post

i dont understand why you guy's 7970's heat runs so high,where do you live? what cases do you have at what fan speeds are you cards running at load?
i have a reference club3d 7970 that dont see 65 degrees under load....i have a fan curve with msi and using a HAF-X
In my scenario, not even HAFX, and all case fans at max doesnt seems to help, its brutally hot here.
Only some good AC unit.biggrin.gif
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post #14030 of 38701
I tried the -xcl command along with the ATI/AMD .dll that were missing from earlier drivers and it does indeed work much better. This is with a fresh install of W7 and the July 19th Unofficial Beta driver from Guru3d forums. Also using official 2.2.3 MSI Afterburner.

You only need to paste the 2 .dll files in the Afterburner folder and then include -xcl at the end of the MSI AB shortcut. When you open the program it will tell you to reboot and after removing the -xcl command and rebooting, you get extended clocks without having to do unofficial overclocking. thumb.gif

Now my core slider can go up to 1495 and mem slider up to 2250. The Power Tune % slider is included in MSI AB as well.

In regards to overclocking, I can hit 1275core with 1.3v but I do have to lower my mem from 1600~1800 down to about 1300~1400. With my memory running higher, I can only do 1200core max, but the scores are about the same in Heaven, so I guess there is a trade-off between higher core clocks/lower mem clocks vs lower core clocks/higher mem clocks.
Edited by Kokin - 7/30/12 at 3:44pm
    
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