I'm trying to pick a drive to dual boot into windows 7 64 bit, I've got 2 in mind,a WD black 500 gig 6.0GB/s, 7200rpm with 32MB of cache, or a WD black 500gig 3.0GB/s, 7200rpm with 64MB of cache, I guess I just would like to know which is fastest, it's main use will be gaming