weird. why did mine come with 993 volts then?
Alright, I set it to the voltage you told me to and after about 5 mins playing d3 my temp was 80 already...
how hot should this card be getting?
i have the nzxt phantom 410 with stock fans(3)
Ouch. That's 80° Celsius, correct? at 1.037 VGPU and stock core clocks? that's pretty hot, to be sure. Temperatures could be the culprit. It's all quite hard to say without knowing exactly what voltages/frequencies we're talking about. Assuming stock clocks/voltage, proper airflow and sub-25°C ambient, I would say that the core shouldn't be going past 70.
In any case, 100% fan-speed is for all intents and purposes unusable due to the annoyingly loud and high-pitched noise it generates. You can call it reverberation or whatever you want -- I call it keep the fan-speed under 65%.
I've removed the heatsinks from both my cards and found the thermal interface material was fine on the GPUs, but haven't checked the memory/VRM thermal pads yet, because I don't have any replacement for those on hand. However, some TF3 7950 owner's have posted to the effect that their cards came with unsatisfactory application of the TIMs. Resulting in poor temperatures.
And I would get a thin white line around the edge of Diablo 3 back when I was playing -- I seem to remember that it had something to do with anti-aliasing. Mind you, this was on a 6950, but the drivers might have some similar bug across both families of cards. Just a thought.
Finally, like somebody else pointed out, big black triangles sound more like a VRAM issue than a GPU one.
I hope some part of this can help a little in troubleshooting the problem.