Computer Crash. Need Assitance.

[aznsoysauce97]

Hello, I recently built my new computer system. Everything seemed fine but recently when I play 720p video or higher my whole computer would freeze and a loud buzzing sound would come out from my speaker. The control panel would not work, the cursor will not move. Nothing can be done except for manually restarting the computer by holding the power button. Anybody have any suggestions on why this is happening?

My build:
Intel i7-930
Gigabyte X58A-UD3R
Diamond ATI 5770
Corsair H50
Corsair 6GB Ram

 

[jsc]

Does everything else work - web, office apps, games?

 

[Onus]

What PSU do you have?
Are you certain the buzzing is coming from your PC's speakers? Actually, you said "speaker" (singular), so is it the piezo speaker on your mobo, OR, is it the one on your graphics card? If the latter, it may not be getting enough power.