My PC configuration is : PC - AT P4 3.0 GHZ(HT) CPU (800 FSB) INTEL 865 GBF M/B/ 512 MB DDR RAM (400 MHZ) ATX VIP CABINET WITH 400 WATTS SMPS SAMSUNG 40 GB HDD - IDE BIG GEFORCE 6600GT 128 MB AGP 8X My system hangsup frequently and also restarts on its own. My 80 gb secondary hard drive also crashed recently . Also the graphics card heats up 59 - 61 degrees . I am unable to play my games Quake 4 , Half - Life 2, Age of Empires 3 , etc. Please help me.