My landlord has this computer, I am in the midst of upgrading it. You can definitely upgrade this computer. I am not sure on the TDP limit for the chip, but it seems with the newer bios it is able to even take some am3 cpus. I have an Athlon II X3 445 and a Phenom II x2 550 to try on it(TDP 95W and 80w respectively). It appears the psu is more than capable. it is a 220W 80plus bronze module, stressing the current system as is I am only pulling a max of 40 watts from the wall. This computer has a pciex1 and x16 slot. I'll hook a 5750 to it with a riser and see how it handles. Will report back.