Dell Precision T3500 Workstation Xeon Quad-Core L5520 2.26GHz 12GB 250GB DVD&plusmn;RW Windows 7 Professional w/RAID Dell Precision T3500 Workstation L5520 2.26GHz Quad-Core Total 12GB RAM 250GB Hard Drive / Quadro FX 4800 Windows 7 Professional No Media Disc