SanDisk ReadyCache 32GB 2.5-Inch 7mm Height Cache Only Solid State Drive (SSD) With Upgrade Kit- SDSSDRC-032G-G26 ReadyCache is compatible with desktop PCs running Windows 7 or Windows 8 operating systems Up to 12 times faster application response times / 4 times faster boot times Read 480 MB/s, Write 115 MB/s, ideal for caching to boost performance ExpressCache software by Condusiv Technologies for caching to increase performance All the benefits of SSD at a fraction of the cost, no need to replace your hard drive