Video cards bits and MHz for gaming computer (please read the text to understand)

CardellB

Distinguished
Oct 29, 2013
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Well, I am building a game PC and I am dubious between these two video cards:
There is a R9 280X with 6400 MHz memory and 256 bits

and there is another R9 280X (this one is V2) with 6000MHz memory and 384 bits.

Both have 3GB memory, GDDR5, have 2048 stream processors and 1070MHz of core clock.