before i had a geforce fx 5200 256mb pci and a jeantech quality 300w power supply and i kept having problems of my ocmputer shutting down on games and applications well now i have a connect 3d ati radeon 9600 256mb agp 8x and a jeantech quality 500w poer supply and my computer still shuts down on stuff well i only tried it once on 3dmark 2001 se and i have to say up to when it shut down there was great performance it blown my fx5200 right out of the sky, anyway it shut down on what i think was the 7th test (nature or somthing were there is a bridge goign over a river and a man fishing and then it was doing 47fps (19fps on the fx 5200) and then the comptuer just shut down now this radeon 9600 has a big heatsink on it covering the memory and its a very complex heatsink but has no fan on wich it doesent really need if it doe snot have one on now whats could be causing the shut down becouse i aint overclocked my card yet but i am going to overclock it when i get a fan for it.