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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 346

post #3451 of 38701
Quote:
Originally Posted by Evildemon View Post

But what do you mean by : "the maximum voltage you can set in AfterBurner/TRIXX is 1.175V" ?
My stock VID is 1.12 and i can give her 1.3, the problem is that its like the GPU cant stand so much voltage...
For example in my case i can get 1175mhz 0 errors on occt with 1.206v but after this i can give 1.28v that wont get more stability... In fact looks like the more voltage i give, the gpu gets more unstable

Using a program like HW Info, you can get a readout of the actual core voltage of a 7970. For me (1.05V stock voltage and 83% ASIC quality), regardless of whether I set the voltage in Afterburner to 1.175 or 1.3, it looks like the core voltage peaks around 1.18 (this is running loops of Crysis 2, which typically takes the GPU up to 98-99% usage). Additionally, at a core clock of 1200, I've noticed that setting the voltage to 1.175 is actually more stable (i.e., I never get a "black screen crash") than setting it to 1.2 or 1.225. Not sure if this is some sort of overcurrent protection built into the card (or whether it can be bypassed with a BIOS flash), but it seems like people with stock VIDs of 1.175 have fewer problems overvolting past 1.2V and thus are able to attain core clocks of 1250+ more easily.
post #3452 of 38701
Quote:
Originally Posted by tsm106 View Post

Do you have a cfx setup? Regardless, you run it with admin rights after disabling your AV program and it will work.

You should decide on an app and run with it, either full on use AB or Trixx, etc. Don't use CCC at all if you use 3rd party overclocking.

Btw, what are your temps like at stock and stock auto fan, full load? Also, what is the asic leakage of your chip? I get the feeling its a low voltage chip?

No, just single card. And I even tried using just MSI AB, and that didn't work either. Just Trixxx...that didn't work. Just CCC still doesn't work. All due to the random lock ups while idle. Not sure why.

My temps at stock are like 73*C full load. Overclocked with 1.175v for 1150MHz I load at like 81*C. Both using the stock fan profile, both using Crysis benchmark tool at 2560x1600. So it SHOULD be fine.

My stock voltage is reported as 1.17v in Trixxx and 1.115v or something like that in MSI AB. My ASIC thing is 76.9% according to GPUz. No clue what that means.
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post #3453 of 38701
I switched from AB to trixx with +20% power tune and my OC runs alot more stable. No crashes. The only crash is when I'm playing BF3 and I run out of VRAM bigeyedsmiley.png 32MP server @ ultra 4xAA 1920x1200 the game uses more than 3.1GB of VRAM tongue.gif
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post #3454 of 38701
I'm still having crashes while overclocked, even though its stable. It only happens after the card has sat idle for too long. Not sure what's going on here. confused.gif

Just tried to open up the Crysis bench (after being on 2D desktop for a long while), and my driver hard locked up.
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post #3455 of 38701
Quote:
Originally Posted by vedaire View Post

well thanks to tsm106 knowledge im at 1225mv 1200mhz core/1375mhz memory 75% fan at a nice cool 51c working on memory now
oh and thats nice and stable in 3dmark06 45minutes occt with 1error and about an hour of playing bf3 gonna play with memory now and if i can get that to 1500 ill be happy and call it a pass.
ok i call it a pass.
http://www.techpowerup.com/gpuz/3vgmd/
18263 on 3dmark06

How long did you run OCCT?
I just ran the 5min Heaven 2.5 bench and I run 7min of OCCT GPU 4.1.0 Beta 8 / 4.0.0

1150/1375 and stock voltage.
According OCCT the voltage it is VIN2 ~1.150-1.167v
But when I run Heaven 2.5 gpu-z reports: 1.090v, so I think the OCCT is either more demanding or wrong.
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post #3456 of 38701
Quote:
Originally Posted by chorner View Post

Nope, y'all haven't apparently - and I've tried all 3 programs: Trixx, the Asus utility, and Afterburner. They all work perfectly fine with CCC, and I find if you don't use CCC and enable the +20% powertune your performance suffers on any decent overclock. Try it...

Not for me, it made it worse.

Doin 1235/1700 @ 1.225 with all CCC stuff left stock
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post #3457 of 38701

im ordering a 7950 on the 8th. I guess i may be the first one to get a 7950 as I noticed the list upfront is all 7970's

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post #3458 of 38701
We have a couple people in here already running 7950's... but don't worry you are still one of few at the moment biggrin.gif
    
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post #3459 of 38701
Quote:
Originally Posted by pioneerisloud View Post

I'm still having crashes while overclocked, even though its stable. It only happens after the card has sat idle for too long. Not sure what's going on here. confused.gif
Just tried to open up the Crysis bench (after being on 2D desktop for a long while), and my driver hard locked up.

It might be time to try the card in another rig.
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post #3460 of 38701
I played HL2 in eyefinity, close to 100% gpu load.

It almost feels like 1070/1375 is more smooth then 1150/1375 which is wierd.
Maybe the card is throttling or something, I have powetune at 20%

Also 1070 vs 1150 gives only 3% increase in Heaven so I might settle on 1070 on core.
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