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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1043

post #10421 of 38704
Hmm after reading up a bit I found out my freezes were caused by a conflict between using DVI and HDMI-DVI at the same time with a dual monitor setup.

Fixed it by using the Active DP-DVI converter that came with my card.

Now, the AAX7970 cooler is ding a very good job at cooling the card, it's hitting around 60-65c load.

Also found out that the vdroop on the 7970 is pretty normal and the amount I have is as well, what I wonder is if there's any fix for it.
Maybe a different vendor BIOS, modded BIOS or w/e. Cards reference so..

I hate to run 1262mV with a full .1v vdroop when all I need to get stable is 1.175mV at these clocks (1250-1750 @ 1.16-1.18v with vdroop and 1.61v VRAM)
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post #10422 of 38704
Quote:
Originally Posted by tsm106 View Post

Gdamn, Danger Den need to hire some CFD people.
why?
Quote:
Originally Posted by Imprezzion View Post

GUys, I have mounted my Accelero Xtreme 7970 on my hd7970 and went OCing, quite a good card I got.

Does 1250Mhz on 1225mV for now.
Mem is at 1750Mhz 1600mV.

Temps in-game / in Heaven 2,5 which i use for stability testing are like 60c with the AX7970.

Only thing I notice is the drop in voltage... GPU-Z's sensors tell me the load voltage is WAY lower then the idle which is also lower then I set.

I set 1225mV. Idle is about 1208mV.
Load onder BF3 Ultra is pretty much 1148-1174mV and it's pretty unstable.
The game and OC itsself run fine, no performance drops or crashes.

Is this normal? I heard stories abt VRM temps so imma check them now.
Idle VRM's are 35c but idk what they do under load so imma test load now.

EDIT: AIDA64 Ultimate tells a lot more abt the GPU.
I ran Heaven 2.5 on absolutely max settings for a couple of minutes on 1250Mhz Core, 1750Mhz VRAM and 11225mV VGPU.

Temps stabilized at 57c for the GPU core and mid-high 60's for the VRM's. They stay really cool. At almost 126A current drawn they still remained under 70c at all times. Voltage however, in AIDA64 called ''GPU VRM'' still dropped from 1.208v to around and about 1.15-1.16v under load.

Does the HD7970 suffer from bad vdrop or something? Cards perfectly stable at these clocks, only when I really push it till like 1300mV to bench at 1300Mhz+ it also drops hard causing me to not get anything past 1275mhz stable.

did you use the paste to attach the little heatsink to ALL the VRM's? every location that the reference cooler makes contact with should be heatsinked
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post #10423 of 38704
Yes I did. I just pasted a sink on everything that the stock cooler hits as well.

But the temps are fine.

Stability is fine as well. Running 1250Mhz on 1.262v. vdroop causes it to run 1.17v on average.
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post #10424 of 38704
SkateZilla
Sorry mate, didnt saw last couple of pages.
Good luck with RMA.
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post #10425 of 38704
Quote:
Originally Posted by sena View Post

SkateZilla
Sorry mate, didnt saw last couple of pages.
Good luck with RMA.

i guess Sapphire doesnt work on Sundays? lol.

Im hoping they upgrade me, since i paid $480 for this card which $480 now can get ma a 7950 DualX from them.
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post #10426 of 38704
Quote:
Originally Posted by TheJesus View Post

Found the results when Gabe @ Swiftech put them under water and overclocked:
Thanks man that's good info. Did they do a write up on the actual performance differences? I'm interested to know if the 7970 is pulled down to the 7950's performance or if they both run to their full potential independent of each other....I've read conflicting statements: some say that with recent AMD cards they each run independently of each other and the better card's performance isn't capped by the lesser card, but I've also read the opposite.

I'd just hate to CF a 7970 & 7950 and not get better performance than CF'd 7950's.
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post #10427 of 38704
I dunno if anyone noticed this but catalyst 12.4 increases SGSSAA and MLAA performance by unbelivable margins. Many games are playable with SSAA now, note the game HAS to support native MSAA or it will not work. If its a post process only game (ie, FXAA such as Deus EX: HR:) SSAA will not work. You'll not want to use 8x SSAA most of the time, SSAA has a big performance penalty but not as bad as before.......been playing Batman: AC with SSAA and it looks and plays great.
post #10428 of 38704
Man prices have dropped, i regret buying the cards so early. frown.gif
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post #10429 of 38704
Quote:
Originally Posted by azdre View Post

Thanks man that's good info. Did they do a write up on the actual performance differences? I'm interested to know if the 7970 is pulled down to the 7950's performance or if they both run to their full potential independent of each other....I've read conflicting statements: some say that with recent AMD cards they each run independently of each other and the better card's performance isn't capped by the lesser card, but I've also read the opposite.
I'd just hate to CF a 7970 & 7950 and not get better performance than CF'd 7950's.

Nah, he was just messing around, no serious write-up.

I've never researched the topic, I assumed if they were at the same clocks it wouldn't be a big difference.

My 7950s at 1300/1850 did 16695P and his did 17305P at 1275/1825, so you will definitely be outperforming.
     
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post #10430 of 38704
Quote:
Originally Posted by TheJesus View Post

Nah, he was just messing around, no serious write-up.
I've never researched the topic, I assumed if they were at the same clocks it wouldn't be a big difference.
My 7950s at 1300/1850 did 16695P and his did 17305P at 1275/1825, so you will definitely be outperforming.
Nice, thanks for the insight.
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