I have the HP m7750n. It was a Vista media center PC that i put windows 7 in, upped the ram from 2gb to 4 gb, and gave it an extra TB of storage. Im currently running a Geforce 8400gs in there but its kind of crappy and i got this good deal for a radeon hd 5750.
I believe the power supply is only 300 watts and im not sure about if it has the 6 pin connector or not. Can anyone help me check if it would fit and work?