HP Pavilion Elite M9160F Desktop PC (Intel Core 2 Quad Q6700 Processor, 4 GB RAM, 720 GB Hard Drive, Vista Home Premium 64-bit) Intel Core 2 Quad Processor Q6700 Desktop PC Genuine Windows Vista Home Premium 64-bit 720GB Storage with Dual / 2x360GB Hard Drives and 4096MB Memory SuperMulti DVD Burner w/LightScribe and HD DVD Player 31.53 Lbs (WxLxH) 16.61" x 7.0" x 15.51"