|The Optiplex 620 is not an all-in-one, it's a tower/desktop computer. Even if you mean one of THESE. According to the following, it has a PCI-E 1.0a slot, & 375W power supply. And if it's a slim-style, you'll have to get a low profile card so keep that in mind when looking.|
What's the purpose of the upgrade - gaming? Home theater? General purpose?
EDIT: reworded & added link
message edited by riider