Western Digital Caviar Black 750 GB SATA III 7200 RPM 64 MB Bulk/OEM Internal Desktop Hard Drive - WD7502AAEX Ships in Certified Frustration-Free Packaging Rotational Speed: 7200 rpm Interface: SATA 6 Gb/s Capacity: 750 GB, Cache: 64 MB Max. External Transfer Rate: 126 MB/s Capacity: 750 GB, Cache: 64 MB Interface: SATA 6 Gb/s Max. External Transfer Rate: 126 MB/s Rotational Speed: 7200 rpm