The rig Im having problems runs window 8.1 ,i7 860,8g rams and a pny gtx 670 water cooled.No heat issue of any kind. Stess test out the a$$ b/c of this issue. No software/program other then FFXIV and gpu drivers. ( I have try all beta and old drivers).The pc I have a work is smiliar just not water cooled and runs a gtx 570. Funny enough the pc at work has ZERO problems,runs the game 8 hours a day and nothing. both using save drivers.