HP Compaq Pro 6300 SFF Business Desktop PC - C7A01UT Small Form Factor PC Windows 7 Professional 64 (available through downgrade rights from Windows 8 Pro) Intel Core i5-3470 with Intel HD Graphics 2500 (3.20 GHz, 6 MB cache, 4 cores) 8GB DDR3 1600 MHz SDRAM 500GB 7200 rpm SATA 6.0 Gb/s NCQ, Smart IV