Computer freezes...maybe overheating

[Ground 0]

Hi, i have run out of ideas to see what is wrong with my PC, thought it might be good to see if any of you can suggest anything. First my computer froze when i was playing games, my friend suggested overheating/dead graphics card, i replaced this and the problem carried on. Now it seems to freeze if i am doing to much mainly when watching videos on youtube and when updating my ipod. Any suggestions?

[Perkins]

Im having the same dam problem. I took off one side of the case and bought a new fan the games seemed to work fine but then it started doing the same thing, but sometimes I can hear the sound go out and then my pc restarts I dont know if its my cpu or power supply.

[lorenz]

Do you have a SATA harddisk? Check to see if the SATA harddisk isn't getting disconnected on and off every time.

[.:MUNDITO:.]

What wattage of power supply are you using. It seams you have a Low Power supply like me, it could possibly be a Power problem like not enough power. Also make sure the fan on the video card is working if it has one as it should.