HP Compaq Elite 8300 SFF Business Desktop PC - D8C18UT Small Form Factor (SFF) Windows 7 Professional 64 (available through downgrade rights from Windows 8 Pro) Intel Core i3-3220 with Intel HD Graphics 2500 (3.3 GHz, 3 MB cache, 2 cores) 4GB 1600 MHz DDR3 SDRAM 500GB 7200RPM SATA Hard Drive