Yes my HDD is a WD1002FAEX, i just download the latest HDtune and it shows my HDD is a SATA 3
so the only diffrence between my two seagate baracuda 7200.12 500 GB SATA 2 HDDs and my WD caviar black 1TB SATA 3 is the buffer size! thats it? what about SATA 3 performance improvements?
anyway thanks guys for your quick responses