so my brother has a GTX 460 768mb. sine he upgrade his windows 8 to 8.1 he had to upgrade display drivers to run League of Legends. however, randomly now the gfx cards freezes and you can heard the fan spinning really fast. its been dusted out, but the issues still comes back. this doesnt happen often, but once every few days. he wants to replace/upage his card anyways, but too broke atm haha. hopefully the gfx card and the forced resets are not slowly killing his system. any inputs? thanks.