Hello,Tried to install a Phenom 4 core/am3 cpu in a HP6313,start up said not compatible and shut down.I installed that same cpu in a Emachine with a am2 socket and it worked fine.Question is will any upgrade be possible and if so will I need to install another type of Athlon cpu only? This HP pc came with a Athlonllx2 215 2.7ghz. Hoping to get a 4 core 3.2 in it. Any suggestions would be appreciated. Thanks Tim