*finally sees this*
Yeah, the power supply wouldn't physically hit in my case. (I have one of those seemingly-ubiquitous Dell Optiplexes with the clamshell-opening mechanism.) It's all of half an inch too long to sit in the power supply mounting, and the power jack and switch on the back don't line up with the hole in my case. The good news is that the card has worked just fine with the existing power supply, so I haven't had any issues there. Part of me does want to get a new case for this hardware someday, if I can find one for this type of motherboard, so maybe I'll be able to use it down the line.