Unless I am playing games from XP or older my GPU runs at 80-99% usage. When I am on my desktop the GPU idles at 0% and depending on which Graphics card I have in either 30-35 degrees Celsius or 40-50 degrees Celsius. When I am in-game though on any game but the old XP ones no matter which graphics card is in the GPU runes 80-99% and heats up to 70 degrees Celsius which for most desktop graphics cards is its overheat point. Which game I am playing depends on how fast it heats up, with the shortest time being about 5 minutes and the longest being about 30 minutes. System Specs Windows 7 Ultimate 64 bit edition 24 GB RAM 4 TB Memory ATI Radeon HD 4850 or NVIDIA GEFORCE 8400 GS Is there anyone out there that can shed some light on my problem.