Samsung Spinpoint F3 HD502HJ 500GB 3.5" 7200 RPM 16MB Cache SATA 3GB/s Internal HDD Hard Disk Drive HD502HJ/D. Samsung Model Number: HD502HJHDD Part Number: HD502HJ/DDell Part Number: X6G6F 0X6G6F KR-0X6G6FCompatible Part Numbers: 62521-C72A-A Specifications: Disk Family Spinpoint F3Form Factor 3.5" Capacity 500 GB (500 x 1 000 000 000 bytes) Number Of Disks 1 Number Of Heads 2Rotational Speed 7200 RPM Rotation Time 8.33 ms Average Rotational Latency 4.17 ms Disk Interface Serial-ATA/300 Buffer-Host Max. Rate 300 MB/seconds Buffer Size 16384 KB Drive Ready Time (typical) 8 seconds Average Seek Time 8.9 ms