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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1694

post #16931 of 38701
Quote:
Originally Posted by Ghost23 View Post

So I'm currently at 1.050 with 1000 core, and 1575 mem.
1.1v and 1050 core caused some blackscreens, should I push for 1.15? My max temps are 45c under extreme benchmarks, usually 40c during BF3 is average, 20's idle.

45c is perfectly fine. You can give it some more juice and see if u can get it stable.
People run these cards upto 1.25/1.30v. Just keep an eye on the temps/artifacting and adjust your fan speed if needed.
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post #16932 of 38701
Quote:
Originally Posted by jomama22 View Post

Just an fyi, the uom in ab when set to 2, basically forces constant 3d clocks/voltage at all times. I am not saying this is bad or hurts anything but you should be aware of this. I have found that running stock clocks through ab will still allow powerplay(clock/voltage 2d/3d) to be enabled and drop to 2d clocks/voltage even when setting ab uom to 2. This is nice as i just leave my ab set to stock variables when working/at desktop and then just enable my oc profile right before i start gaming.

Incorrect. It does not force constant clocks. My clocks idle at 500/150 on main card and 300/150 on slave cards.

For reference:

LL
Edited by tsm106 - 10/18/12 at 6:16pm
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post #16933 of 38701
Hey guys. Im having trouble with my 7950. Im not sure if it is a physical issue or a driver/software issue.

Currently using 12.9, however had troubles with 12.4 (i think it was 12.4...)

I tried overclocking it. I got to 1100 core clock, and everytime it was unstable i had a driver crash, so i bumped volts up.
Got to a point where my drivers no longer crashed. Bumped volts up another notch for good measure. I noticed while playing some games i have pretty bad issues. Playing Sim City 4, Bf3 and Skyrim.

Several different things happen.
Screen goes black, everything still running, still have audio from windows and stuff, game is frozen (cant see game, but lack of game audio tells me this).
After pissing around trying to get video back, i turn my monitor off and back on. This gives me video again. Sometimes the game is non responsive, only shows a white window. Needs to be force closed.

Sometimes a similar thing happens. The screen freezes, and then goes white. My GPU usage, shown on my Logitech G15 shows 0% core utilization, clocks down to 300/150mhz. After mashing stuff for a while i can eventually close the game window, which has whited out my screen. The game again in non responsive.

Anyone have any insight? Could i need more voltage on my overclocks??? I had my memory at 1575 at 1.5v as well as the core at 1100mhz @ 1156mV
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post #16934 of 38701
sounds like a unstable overclock drop memory to stock and keep working on the core volts till its stable.
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post #16935 of 38701
Quote:
Originally Posted by Bal3Wolf View Post

sounds like a unstable overclock drop memory to stock and keep working on the core volts till its stable.

Ive run Techpowerup render test for about an hour and a bit and no issues at 1100/1250 with 1.156V of core voltage.
This is pointing to my previous memory OC. I hope this was my issue, as bumping memory voltage is a very easy fix compared to screwing with drivers/hardware.
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post #16936 of 38701
Quote:
Originally Posted by shredded View Post

Ive run Techpowerup render test for about an hour and a bit and no issues at 1100/1250 with 1.156V of core voltage.
This is pointing to my previous memory OC. I hope this was my issue, as bumping memory voltage is a very easy fix compared to screwing with drivers/hardware.

Well its not a stress test so it might not help you that much better off running games and watching for artifacts or crashes.
http://www.techpowerup.com/forums/showthread.php?t=159099
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post #16937 of 38701
Quote:
Originally Posted by Bal3Wolf View Post

Well its not a stress test so it might not help you that much better off running games and watching for artifacts or crashes.
http://www.techpowerup.com/forums/showthread.php?t=159099

Cheers for the advice, i just got Heaven and i'll run as well. The more things i try stress my card with the better i guess? When i get to my desirable clocks i run BF3 anyway. Thanks again!
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post #16938 of 38701
Quote:
Originally Posted by shredded View Post

Quote:
Originally Posted by Bal3Wolf View Post

Well its not a stress test so it might not help you that much better off running games and watching for artifacts or crashes.
http://www.techpowerup.com/forums/showthread.php?t=159099

Cheers for the advice, i just got Heaven and i'll run as well. The more things i try stress my card with the better i guess? When i get to my desirable clocks i run BF3 anyway. Thanks again!

i have been told heaven isnt that good for stress testing as well but i cant hurt.. games and use 3dmark11 as well especially to check your vRAM as you overclock your vRAM and reach a point where in 3dmark your score drops, this means there is too much data being sent and the vRAM is running ECC which hinders performance.. smile.gif
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post #16939 of 38701
Quote:
Originally Posted by stubass View Post

i have been told heaven isnt that good for stress testing as well but i cant hurt.. games and use 3dmark11 as well especially to check your vRAM as you overclock your vRAM and reach a point where in 3dmark your score drops, this means there is too much data being sent and the vRAM is running ECC which hinders performance.. smile.gif
I find 3dmark11 a good tester if my core is not stable i get aritfacts on the screen or a driver crash but also iv noticed even when it does a good run of 3dmark11 some games will show artifacts around water,fire ,gunshots and when stuff explodes.
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post #16940 of 38701
Hello all, potential 7970 crossfire owner here. So as many of you owners (and potential owners such as myself) would know, there have been countless reviews arguing that SLI is "smoother" than xfire despite 7970 xfire setups pumping out more frames. They do not offer any explanation other than it "feeling" smoother despite lower frames. This made me dubious, but upon further investigation there are actually a lot of users who have also claimed this and then there are charts like this http://forums.anandtech.com/showpost.php?p=33714178&postcount=156 So it seems that the reviewers weren't just being biased.

I also noticed that many of these reviews were way back in March/May and I found that the AMD drivers had come a long way since then. Has this smoothness issue been fixed? Cos if so then it's an easy choice, more frames + equally smooth. Thanks, guys, would appreciate your input very much so.
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