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Seagate Momentus XT 320 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Solid State Hybrid Drive

Solid state hybrid drive delivers SSD-like performance with hard drive capacity options
Adaptive Memory technology customizes performance by aligning to user needs for overall improved system response
80 percent faster performance than traditional 7200-RPM drives in PCMark Vantage benchmark scores
Low heat and vibration - quiet operation without giving up storage capacity and affordability
OS- and application-independent - designed for any SATA standard laptop PC