Western Digital Caviar Green WD5000AACS 500GB 5400 to 7200 RPM 16 MB Cache SATA 3.0 Gb/s Hard Drive Regulatory Approvals: BSMI TUV 5.6 ms average latency Power Specifications: +5V, 0.70A +12V, 0.55A 3.5 inches, made for desktop Serial ATA interface with 3.0 Gbps data transfer rate. Features high quality/tier 1 High Speed 500 GB Internal Hard Drive 8/16 MB cache buffer 8.9 ms average read seek Features high quality/tier 1 High Speed 500 GB Internal Hard Drive Serial ATA interface with 3.0 Gbps data transfer rate 8/16 MB cache buffer 8.9 ms average read seek 5.6 ms average latency Power Specifications: +5V, 0.70A +12V, 0.55A Regulatory Approvals: BSMI TUV