sorry man do some reading, the raptors arent the fastest out there anymore, even the velociraptor is cutting it close at sata2, the original raptors are only sata 150 also.
Bigger cache, NCQ, perp. Recording at 7200 rpm=faster than a raptor at 10k rpm
Read here, great article Samsung Spinpoint F1 HDDs: New Winners? | Tom's Hardware
as you can see the raptor isnt that great compared to the newer drives out there.