HP Compaq Elite 8100 (SFF) QM411US#ABA Small form factor CORE i5 650 3.20GHz 4GB 250GB DVD+/-RW Intel 64mb VGA Graphics DP 8xUSB WIN 7 PRO 64BIT QM411US QM411US#ABA CORE i5 650 3.20GHz processor CORE i5 650 3.20GHz processor 2 cores/4 threads Windows 7 Professional 64BIT 4GB DDR3 PC3-10600 (1333MHz) with two available slots