You could play CS:S on max settings, Doom 3 on high settings. UT2k4 on max settings.
Wheras with that Radeon 9550, you wouldn't even be able to play Doom 3, lol, well in my book you wouldn't be able to. And CS:S MAYBE on medium-low settings.
This one I put together is like 4 or 5 times faster.