fan mounts

I built my computer around 3 years ago, so it was about time to clean the insides anyway. I've tried spraying compressed air into the case (taking every basic precaution) which did fix the problem for a bit, but it ended up stopping again. My case is a Xion XON 310 BK, a cramped, ugly mess of...

I have “gaming” PC with a gtx 960 GPU and i7-6700 CPU . The max temperature with my GPU is around 60°C. I use this PC for mining Ethereum . Is bad for my PC to run 24/7 ? P.S. The PC is Lenovo Y700 desktop.