Hi, I have just built my home built system and whenever I play a GPU intensive game such as Battlefield Bad Company 2 or Starcraft 2 (Ultra) the screen freezes and I can't move my mouse or my keyboard. The screen shows the picture that it was at before the only way of getting out of it is to hardware restart my pressing the restart on my computer. All my drivers are up to date and I do not know what is wrong with it.
CPU:AMD Phenom II X4 955 Black Edition HDZ955FBGMBOX
Memory:G.SKILL Ripjaws Series 4GB (2x2gb) DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL8D-4GBRM
PSU:Antec BP550 Plus 550W Continuous Power ATX12V
GPU: XFX 4850 HD 1gb 256 bit
Mobo: ASRock 870 EXTREME3
DVD drive: LITE-ON CD/DVD Burner
Harddrive: Western Digital Caviar GP RFHWD5000AACS 500GB
G110 gaming keyboard
Deathadder 3500dpi
CPU:AMD Phenom II X4 955 Black Edition HDZ955FBGMBOX
Memory:G.SKILL Ripjaws Series 4GB (2x2gb) DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL8D-4GBRM
PSU:Antec BP550 Plus 550W Continuous Power ATX12V
GPU: XFX 4850 HD 1gb 256 bit
Mobo: ASRock 870 EXTREME3
DVD drive: LITE-ON CD/DVD Burner
Harddrive: Western Digital Caviar GP RFHWD5000AACS 500GB
G110 gaming keyboard
Deathadder 3500dpi