Comment 4 for bug 1321623

I am having the same issues. Mint 17 64 bit- cinnamon - amd fx 6300- m5a99fx pro r2.0- nvidia geforce 660 gtx ( running nvidia -304 driver, then switched to nvidia- 331 driver). I find that is will freeze after about 15 min of not being used, and also when there is too much load on the system.
kernel- 3.13.0-24-generic