I have a HP ProBook 6550b notebook PC and I was wondering but can I upgrade my CPU to Intel Core i7-720QM? I have a Intel i5-460m now but I know the Intel Core i7-720QM will fit but will it work fine? I don't have a discrete video card just a Intel HD but just wondering if the Core i7-720QM CPU will work fine? I can get them on Ebay use at a good deal. I pretty sure the Intel Core i7-720QM has Intel HD graphics built in it right? If not I will have to use like Intel Core i7-620M.