Just got my Power Color 7970 back from RMA. It looks like it's a new card (pretty sure it is). My computer booted fine with the new one in, no driver issues or anything. I started running Kombustor after checking afterburner for good settings etc. A few seconds into the stress test (I did 3 different ones) the temperature spikes all the way to around 60 and the fan is going at my specified percentage and then the screen just blacks out and doesn't come back on (it lasts around 5 seconds in a stress test). The fans are still running and my HDD and CPU are still going (I think), but I have to hold down the power button and cold boot. Is this card DOA or is it me?