I recently bought an EVGA GTX 970 SSC for $70 from a friend of mine who claims it's been mining for about a month. I've tested it in Furmark at 1080p with 8x MSAA and it seems to be stable at 58-65 fps. The temps were high at about a 91°C average in all of my tests. Both fans work silently under a normal gaming load and I didn't immediately notice any discoloration on the PCB. It seems a little too good to be true at this price, given that this card has been running for 730+ hrs likely at full continuous power. Does a month of mining do all that much to a graphics card? Am I just stressing ove