Seagate 1TB Barracuda 7200.11 Bulk/OEM Hard Drive ST31000340AS 1 TB SATA NCQ internal hard drive is ideal for performance PCs, gaming, workstations, desktop RAID, and more 32 MB cache buffer; 7200 RPM for fast read/write times; Perpendicular recording for increased data density Adaptive Fly Height offers consistent read/write performance from the beginning to the end of your computing workload