WD Raptor has evolved! PC enthusiasts' favorite 10,000 RPM SATA drive is now faster than ever and available in a 300 GB capacity. Engineered for maximum speed, WD VelociRaptor combines a SATA 3 Gb/s interface and 16 MB cache, to deliver performance that's up to 35 percentage faster than its speedy older brother. With 1.4 million hours MTBF, these drives have the highest available reliability rating on a high-capacity SATA drive and are designed and manufactured to enterprise-class standards to provide enterprise reliability in high duty cycle environments.