HP xw8600 Workstation Xeon Quad-Core E5440 2.83GHz 4GB 160GB DVD&plusmn;RW Vista Business w/RAID HP xw8600 Workstation Xeon E5440 2.83 GHz Mid Tower System General Features: Mid-tower form factor Microsoft Windows Vista Business 32-bit pre-installed w/CoA Intel Xeon E5440 2.83 GHz quad-core processor Intel 5400 chipset 4 GB DDR2 PC2-5300 FB-DIMMs 160 GB Serial ATA hard drive Integrated LSI SAS 1068E controller w/RAID, 0, 1, 1E/10E DVD RW DL drive with LightScribe