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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1427

post #14261 of 38701
Quote:
Originally Posted by ukic View Post

I have read somewhere that it's a problem with the latest msi ab 2.2.3, voltages doesn't stick. Apparently it's missing 2 files. They suggested using msi ab 2.2.0, see how it goes.
I'm already using the 2.2.2 version. Will give a try with 2.2.3
post #14262 of 38701
One of my 7970 OC's can do 1175MHz at stock voltage but still can't do anymore than 1250MHz with 1300mV...
post #14263 of 38701
Quote:
Originally Posted by k4sh View Post

I'm already using the 2.2.2 version. Will give a try with 2.2.3
Did you read that post at all? lol... he said don't use 2.2.3, use 2.2.0
post #14264 of 38701
Can anybody help me find version 2.2.0? I can't use the beta version because it won't work. What are these missing files? I would really like for AB to work again like it used to.
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post #14265 of 38701
Quote:
Originally Posted by PureBlackFire View Post

Can anybody help me find version 2.2.0? I can't use the beta version because it won't work. What are these missing files? I would really like for AB to work again like it used to.

You can use any beta if you change the date so that the alert box doesn't display any more.
Unfortunetaly for me 2.2.0 beta 15 didn't help in applying successfully the changes made to memory voltage thinking.gif
post #14266 of 38701
Quote:
Originally Posted by k4sh View Post

You can use any beta if you change the date so that the alert box doesn't display any more.
Unfortunetaly for me 2.2.0 beta 15 didn't help in applying successfully the changes made to memory voltage thinking.gif
Sounds like you're having the same issues as me.

Even though I increased my memory voltage to 1650, msi AB is still showing 1.60. It's odd though since I only increased the voltage because it would crash immediately upon loading a BF3 map at default voltages, and after increasing it it stopped crashing yet MSI AB shows no changes.

Really annoying.
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post #14267 of 38701
Quote:
Originally Posted by Yvese View Post

Sounds like you're having the same issues as me.
Even though I increased my memory voltage to 1650, msi AB is still showing 1.60. It's odd though since I only increased the voltage because it would crash immediately upon loading a BF3 map at default voltages, and after increasing it it stopped crashing yet MSI AB shows no changes.
Really annoying.

Interesting ... devil-smiley-019.gif
Edited by k4sh - 8/7/12 at 2:42pm
post #14268 of 38701
I have an idea why the 7970 bios on the 7950 (despite breaking hdmi output- anyone fix this btw???) gives slightly better results at the same clocks as 7950 without unlocking shaders.

Powertune is a crafty thing...

I have a Gigabyte 7950 Windforce model that I got a month ago and was testing a lot with overclocking.

Once I OC'ed to a stable 1100 @ 1.23v (only OCCT 4, at 480x480 , shader complexity 8 would find errors past this point, everything else was "stable"), I started to see how powertune kicks in by watching MSI AB's clock chart. It would throttle it back... pulling max 18 amps on the 12v input according to HWinfo64/gpu-z.

I tried a few other bioses, including the 7970 asus.
Of course the 7970 bios wouldn't throttle, it's already set to a higher TDP, so +20% powertune was way over what OCCT/kombustor was pulling.

But, there was a 7950 bios that didn't throttle in OCCT at the same clock/volts either!
The Sapphire 900mhz edition: http://www.techpowerup.com/vgabios/115188/Sapphire.HD7950.3072.120116_1.html

Both that bios and the 7970 bios would max out 12v input to 22 amps. No throttling observed in MSI AB or Hwinfo64. FPS was higher, I don't recall the difference as I did it a while ago.

I ran Unigine v3 @1100/1.23v with the stock Gigabyte Bios, the 7950 Sapphire Bios, and 7970 bios all with +20% powertune, knowing that the Sapphire and the 7970 bioses didn't throttle back in OCCT. It turns out that the Sapphire and 7970 bioses got higher scores, similar in comparison to the website that saw an improvement with the 7970 bios. It helped with the minimum FPS, IIRC it was 19,5 and afterwards 22 or so.

So, that makes me feel that the gains seen with the 7970 bios is due to powertune throttling, which also explains the better min FPS.

Also, all of you with crazy clocks, try the latest OCCT 4 at 480x480, shader 8 with PT +20, and see how errors pop up, even though it seems stable in Unigine and other games that don't really max out the card!

Anytime I overclock something, looking for a 24/7 clockspeed, I want it to be stable at the most extreme conditions.

BTW, what is dissapointing is that i can't get ram above 1400. It runs fine in benches but I get random issues when on normal desktop. The screen turns light blue (not bsod color) and the fans spin up to 100%. I can't recover it like a normal OC issue and have to power cycle the PC.
post #14269 of 38701
Because of different memory latencies.
HD 7970 bios has more aggressive latencies than HD 7950 bios.
Edited by sena - 8/7/12 at 4:50pm
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post #14270 of 38701
Quote:
Originally Posted by ukic View Post


I have read somewhere that it's a problem with the latest msi ab 2.2.3, voltages doesn't stick. Apparently it's missing 2 files. They suggested using msi ab 2.2.0, see how it goes.

 

http://www.overclock.net/t/1196856/official-amd-radeon-hd-7950-7970-owners-thread/7800_30#post_16833757

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