I bought one of these, and you can fit a regular graphics card in them, but you cant fit them into a regular case, they mount to a plate that mounts to the case and the case to M/B hookups are propietery as in without the harness I looked for days on the internet to figure out which pins in the 24 pin array was for power, and they are not side beside, they are several pins apart....So unless you like hassels stay away from most of the optiplex line..