I have a MSI Gaming gtx 760. I would like to overclock it but im worried about the life span of the card im broke and probably will be for a while so that means if i kill this graphics im not getting another one anytime soon but i would still like to overclock so should i maybe just overclock it a bit without increasing the voltage? would that still have an effect on the lifespan of the card? or maybe just turn up the voltage a few mv? The max i can turn up the voltage is 12 mv. The card seems to stay very cool even overclocked i have never seen it above 70c. So if the voltages are up but the card still stays cool will the voltages alone shorten the life of the card or is it the heat that does it?