I have had my build for around a year and a half - GPU has given same issue ever since I bought it.
PC sets voltage at 0.950 if I remember correctly and from within the standard software I have I can up the card to 1.2.
At 0.950 card freezes up PC and gives the message "Stopped responding and recovered"
Ramp it up to 1.2 and it seems to work.
Very weird - shoulda taken card back. (Club3d)
Anyone else ever experienced this?