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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 351

post #3501 of 38704
Hmm. I can't seem to get anything past 1075 MHz on the core stable in OCCT. I can hit that on stock voltage (1.112 V), but I get errors at 1100 and voltage manipulation doesn't seem to help. I'm a little confused as I would have expected the core to be more stable at 1.150 or even 1.175 than at 1.112 as core clock increases but that hasn't been the case. Any input?

Edit: Powertune is set at + 20% through AB.
post #3502 of 38704
Quote:
Originally Posted by Denim-187 View Post

Quote:
Originally Posted by pioneerisloud View Post

I have....several times.
Was just talking with reflex on Steam, he thinks it sounds like the zero power state balogna thing. Is there a way to disable that stupid thing?
I can game, game, and game for HOURS on end overclocked just fine (1200 core). I can close games, play around on OCN for a bit. Open a game up again and still fine.
Once I let it sit for too long not in a 3D app though (about an hour I think), as soon as I open a 3D app again, my machine hard locks with the AMD driver dying on me. It doesn't do this at stock though, only overclocked.

This is zero core..... what you can do is this....
With Afterburner use profiles...

set the 2D profile as stock
set the 3D as your overclocked profile.
This would mean you will have to save a default profile in the bank ofcourse.

This way when the card goes to desktop, it automatically goes back to stock, but when u game it automatcally overclocks as soon as a game is executed.

That way zero core and and overvoltage don't conflict and hardlock. thumb.gif

Yeah, Blitz6804 just told me about that. He said it never worked for him with his 6970's, but I'll give it a shot. smile.gif Thanks for that!
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post #3503 of 38704
My 7970 finally arrived!!! Everything at stock for right now, but not for long486
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post #3504 of 38704
Quote:
Originally Posted by PenguinoPapa View Post

Just wondering because I get a crash very quickly in OOCT when I set the voltage in the 1.225 range, and it doesn't seem to be temperature related as the card is at 66-68 degrees when my screen goes black and I have to reboot. Initially, I assumed that this was being caused by my having set the voltage too high, but the settings seem to be in-line with the maximum allowable. I'm using the latest AB, btw.

You have to take into account vdroop as well. Whatever you input into AB and what it shows is just "intended" voltage. Thus you never really know what the actual voltage is thru AB. You have to use gpuz and watch it's graphs. this is the same with memory voltage.
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post #3505 of 38704
Quote:
Originally Posted by tsm106 View Post

You have to take into account vdroop as well. Whatever you input into AB and what it shows is just "intended" voltage. Thus you never really know what the actual voltage is thru AB. You have to use gpuz and watch it's graphs. this is the same with memory voltage.

That has always been the case, only now you get to see what's really going on.
 
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post #3506 of 38704
Quote:
Originally Posted by tsm106 View Post

You have to take into account vdroop as well. Whatever you input into AB and what it shows is just "intended" voltage. Thus you never really know what the actual voltage is thru AB. You have to use gpuz and watch it's graphs. this is the same with memory voltage.

Right, but voltage droop would cause the actual voltage to be lower than the target voltage, which already should be below the threshold for the card based on the maximum differential of +0.125 over stock.
post #3507 of 38704
Quote:
Originally Posted by PenguinoPapa View Post

Right, but voltage droop would cause the actual voltage to be lower than the target voltage, which already should be below the threshold for the card based on the maximum differential of +0.125 over stock.

Yep, so with another hurdle added it gets hard to figure out where voltage is actually sitting. Also iirc, vdroop is around .04mv.
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post #3508 of 38704
I have one coming in a few days, are all 7970s reference atm? Damn that impulse buy tongue.gif
post #3509 of 38704
Man, OCCT is just brutal on temps. It looks like my card is very sensitive to temperature once it gets up past 1075 MHz, as I consistently get errors from OOCT at 67-68 degrees. It looks like water cooling would make a huge difference in the speeds that I could run, but I'm hesitant to spend the money in case it only adds up to a minimal gain.
post #3510 of 38704
Quote:
Originally Posted by PenguinoPapa View Post

Man, OCCT is just brutal on temps. It looks like my card is very sensitive to temperature once it gets up past 1075 MHz, as I consistently get errors from OOCT at 67-68 degrees. It looks like water cooling would make a huge difference in the speeds that I could run, but I'm hesitant to spend the money in case it only adds up to a minimal gain.

That's why I don't use OCCT. wink.gif

I use Crysis benchmark. If it passes about 30 minutes of that, then its stable. I used to use Heaven bench for 30 minutes, but Crysis was artifacting on me with a stable heaven run.

I have yet to run a game overclocked stable with Crysis, that has given me any issues at all. So for me, if it passes the Crysis bench for 20-30 minutes, I never have a problem with it in games.
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