Hi I am trying to upgrade the cpu in my compaq presario.. it has m2n68-la (narra5) mobo. It came with a sempron le1300. I tried a 945 Deneb in it and it kept crashing windows after a few minutes of use. I thought maybe bios issue but do not know anything about that so tried a phenom x4 9750 which is working good but lacks the speed I need to run pcsx2 and dolphin emulators. My question is what processor would be recommended for this board that should be a simple changeout without any bios issues and runs at least 3.0Ghz? I have no problem downgrading to a dual core from a quad core to get the speed I need the emulators only require a dual core and as I use this PC for mostly emulation I can deal with less multi-tasking ability. Or if anyone can help explain how to update/change bios for a processor change. HP specs say this is a AM2+ socket which i believe means an AM3 processor should work?