The WD Caviar Blue PATA Hard Drive (160GB) features a cache size of up to 32MB, 7200 RPM spin speed, a PATA interface and a data transfer rate of up to 100MB/s. With its ultra-cool feature, the 160GB hard drive keeps the system cool during operation, thus protecting the drive and data from excess heat. Featured NoTouch Ramp Load technology ensures that the recording head never touches the disk media, providing enhanced drive protection in transit. IntelliSeek function calculates optimum seek speeds to minimize power consumption, noise and vibration. ShockGuard feature instantly protects your hard drive from bumps and vibrations while it is in operation.