Hybrid Hard Drive
 

if your upgrading your HD this might be a good option, considering a 500 GB SSD is almost $700

http://www.newegg.com/Product/Produc...82E16822148591

$149

Designed with high-performance core components on an innovative platform, the Seagate Momentus XT solid state hybrid drive consists of a 7200-RPM hard drive with 32MB of cache, 4GB of solid state SLC NAND flash storage, and Adaptive Memory technology, delivering an 80 percent faster performance than traditional 7200RPM hard drives.

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