Originally Posted by cjc75
So, is it possible, there might be some minuscule flaw with my Diamond 6950, perhaps a bad memory sector that only gets touched once a week or so... or maybe something else?
Is it possible my 6950 is pulling too much power from my old Thermaltake Tr2 RX 850
? I've been told in the past that this is not a true 850wt PSU as Tt advertises, but actually a 750wt thats Tt passes of as an 850... it handled my 5850 just fine and before that it ran a single GTX 275...
Though I know, many people here have been running 6950's and 6970's just fine on smaller 750wt PSU's...
Anyone got any thoughts on this odd black screen with white lines lock up?
I am running a 6950 and a 6970 on a Corsair AX750, so I really doubt your PSU is having an issue with the 850 even if it is over rated.
For a decent test of your video card, flick the switch back to the 6950 setting and run it for a week that way. If you don't get any more problems then you could be looking at some bad shaders (6950 has less shaders) or perhaps the RAM on the card will not handle the 6970 speed or timings.
Another thing you can do is increase the speed of your GPU fan. When I first got my 6950 I noticed it ran quite hot but wasn't too bad. When I got my 6970 I thought they would have increased the fans speed to compensate for the higher clocks but they didn't and the 6970 ran even hotter than the 6950 does.
So, first I tried Trixx to change the speed/temp ramp, and although I love that software for its simplicity it would not allow adjustments to two cards.
So, I have installed Afterburner and I have adjusted the fan ramp for both cards to be exactly the same. The fans now run faster at lower temps, and even faster at higher temps. I knocked between 5 and 10c off the max temps just by increasing the fans speeds at the cost of more noise.
You could try using Trixx to increase your fan ramp and see if the cooler temp stops the problem.
A last resort would be to track down the correct BIOS for your card, but one that has been modded to unlock the shaders and increase the clock speeds without altering the voltages or timing of the GPU memory. This would be a decent test to see if the memory timing or voltages were causing the problem.
Finally, you could install the correct BIOS and just overclock it without unlocking the extra shaders. This will tell you for sure if the shaders were the problem.