Hi every one I have a Desktop PC with the following specification MSI P4M900M2-L Via Vt8327A Chipset Intel celeron D 2.8Ghz processor 1GB Kingston Ram ASUS ATI redion 512MB PCIXpress, graphic card Befor i bought the xpress card I had a problem that my PC get restarted every time i run a big game and also it heats up. It works fine when i do other stuff like browsing listnig songs watching movies. but when ever i run a game it after some time hangs up and then get heated and then restarted. It didn't happend all the time. But when I installed a Xpress card It always happen in the start of the game. Then I came to know about the solution here on techspot, that was to change the PSU to Better Quality and of better company giving more Volts like 500V. I did not changed it in fear that my PC will get burned and i do not know about that. should I chage it or not? And any other solutions and suggestions.