Buying new VGA to play CoD

[Lozmy]

Hi guys,

I would like to ask you for an opinion.

Im planning to do this kind of upgrade:
-Intel Core i7 960 3.2GHz BOX
-ASUS Sabertooth X58 "Gaming Series" Motherboard
-CORSAIR DDR3 3x4096MB CMP12GX3M3A1600C9 DHX

And now the question:

I am going to upgrade my rig as described above but I am a bit undecided regarding VGA choice. Yes I know that the finest choice would be something like GTX580 3078MB GDDR5 but guys what do you think about an Nvidia GTX480 1536MB GDDR5?

Would It be acceptable to use the GTX480(which I currently own) together with the new PCU, memory, etc.?

Thanks

Best regards