What the hell guys!
Get a quad core if you want to play BF3. Phenom ii x4 955
Get an AM3+
Change the PSU.http://www.hardwaresecrets.com/article/Cooler-Master-eXtreme-Power-Plus-600-W-Power-Supply-Review/1034/9
A corsair Cx600w or Antec Earthwatts 650w
Dont' get a green drive. It's slow compared to other drives since it's specific use is for storage. Get a samsung spinpoint f3 or WD caviar black for the boot drive ( where you will put your OS).