It should fit, not a very large card. It does use 60 watts or so of power at full load, so you want to make sure you have a 300 watt power supply in there, anything less you'll be risking crashes. ATI recommends 400, but those are always on the high side as they need to leave lots of headroom for other components to prevent return issues.
Yeah, i found the dimensions at the bottom but still didnt really help.
On a different note, can you see any flaws in this set-up? its a good price for a phenom.