i have one thats 1gb it a new one the other new one is 512 mb the other 5 are out of my hp desk top all of my desktops were in great shape before i decided to change to mac i just would rather part them out than sell them with all my personal stuff on there so i pulled the hard drives and put them away i know if your computer has two notches it should fit but I'm good but not an expert but I'm sure that the price will be reasonable enough that you can always sell them to someone who needs them if they dont work