I have an HP Pavilion p6714y as my main rig and i put a Radeon HD 5450 in it to make it slightly less of a toaster but I want to upgrade it more. I have an idea for a GPU but when it comes to the CPU i have no idea what to do because on HP's website it says the motherboard is compatible only with AM2+ socket cpu's but under cpu information it says that it has an AM3 socket. It is the AMD Athlon II X4 640. Is there a possible upgrade for this cpu?