The WD Velociraptor Hard Drive WD5000HHTZ is a high-performance 500GB internal desktop hard drive designed by Western Digital. With a rotation speed of 10000 RPM and 16MB cache, this SATA II drive offers fast data transfer rates of up to 300 Mbps. It is compatible with PCs, memory vaults, and Macs, and features a sleek black design. This HDD only storage solution is ideal for users looking for a reliable and efficient storage option for their desktop system. The VelociRaptor model includes features such as hot swap capability and temperature sensor for added convenience and safety.