amd athlon II 3x 455 3.3ghz stock cooler
N68C-GS FX am3 MoBo
2x2gb 1600 mhz ddr3
1x 320 gb HD
1x 80mm case fan
i know the CPU is a bottleneck no need to inform that to me
AMD recommends a 550w with a 8-Pin power connector. Most of the time you can run cards with less than the required wattage but I recommend to everyone not to do that. As the PSU is pretty much the most important part of the computer. You want to make sure that you 1. Have enough power to power everything. And 2. Have even extra to work with. And a good quality power supply as well.