DELL PRECISION T3500 W3550 3.06 GHZ CPU 8GB MEM 500GB HDD WINDOWS 7 PRO 64 BIT INSTALLED HD7770 VIDEO CARD INTEL XEON W3550 3.06GHZ CPU 8GB MEM 500GB HDD WINDOWS 7 PRO 64 BIT INSTALLED AMD RADEON HD7770 2X FRONT USB 2.0, 6X REAR USB 2.0