Hi Uncle,
i wont say if this is a great build because im too lazy to check, however
i have the:
3570k (4.2 ghz)
gigabyte 7950 windforce 3
8 gb corsair 1600 cl9 (low profile)
and a corsair CX750 (yes CX not TX)
and i can tell you, this is a crazy setup, it runs everything you would want to run (for example BF3 @ 70 fps)
i overclocked the 3570k cause it bottlenecked my gfx and could only get 40-75 fps on bf3 now i have 50-120)
As far as i know the TX has better specs than the CX so, you should be fine with it too (i accualy chose the CX cause it was cheaper, and had more watts, but less amperage though, so only one video card possible i think the TX has 53 amps so that should handle 2 7950's)
i hope i helped you,
Demisor