HP xw4600 HP xw6600 Dell Precision T5400 Dell Precision T7400 Processor Intel Core 2 Quad Q6600 2.4GHz Intel Xeon E5430 2.66GHz Intel Xeon E5430 2.66GHz Intel Xeon 5482 3.2GHz Number processors 1 2 2 2 Cores per processor quad quad quad quad L2 cache per processor 8MB 12MB 12MB 12MB Chipset Intel x38 Intel 5400B Intel 5400 Intel 5400B System RAM 4GB 4GB 4GB 4GB RAM type and speed DDR2 800MHz DDR2 667MHz DDR2 66 HP xw4600 HP xw6600 Dell Precision T5400 Dell Precision T7400 Processor Intel Core 2 Quad Q6600 2.4GHz Intel Xeon E5430 2.66GHz Intel Xeon E5430 2.66GHz Intel Xeon 5482 3.2GHz Number processors 1 2 2 2 Cores per processor quad quad quad quad L2 cache per processor 8MB 12MB 12MB 12MB Chipset Intel x38 Intel 5400B Intel 5400 Intel 5400B System RAM 4GB 4GB 4GB 4GB RAM type and speed DDR2 800MHz DDR2 667MHz DDR2 667MHz DDR2 800MHz Graphics card Nvidia Quadro FX 1700 Nvidia Quadro FX 4600 Nvidia Quadro FX 4600 Nvidia Quadro FX 4600 Graphics RAM 512MB 768MB 768MB 768MB Disk capacity 250GB 250GB 80GB 146GB (73GB x 2) HDD model Seagate Barracuda Seagate Barracuda Western Digital Caviar SE XL160S Dell Virtual Disk HDD interface SATA 3.0 Gb/sec SATA 3.0 Gb/sec SATA 3.0 Gb/sec SAS HDD RPM 7200 7200 7200 15000 HDD cache 16MB 16MB 8MB 32MB (16MB x 2) Network GbE GbE GbE GbE CD/DVD 16x DVD+/-RW 16x DVD+/-RW 18x DVD+/-RW 16x DVD-ROM RW Jacks, plugs, case USB front, rear, internal 2, 7, 1 2, 5, 1 2, 5, 1 2, 5, 1 PS/2 475 W 650 W 875 W 980 W Power supply 2 2 2 2 Warranty 4 hour on site, 3 years Next business day on site, 3 years Next business day on site, 3 years Next business day on site, 3 years Operating systems Windows Vista Business, Windows XP Pro, Red Hat Enterprise Linux Workstation 4 Windows Vista Business, Windows XP Pro, Red Hat Enterprise Linux Workstation 4 Windows Vista Ultimate, Vista Business, Windows XP Pro, Red Hat Enterprise Linux Workstation 5 Windows Vista Ultimate, Vista Business, Windows XP Pro, Red Hat Enterprise Linux Workstation 5 Expandability Drive bays (3.5″, 5.25″) 3, 5 2, 2 2, 2 4, 3 PCI slots (legacy, PCIe x8, PCIe x16, PCIe x64 ) 4, 1, 1, 0 2, 2, 2, 0 1, 1, 2, 2 1, 1, 2, 3 Max RAM, Max DIMMs 8GB, 4 32GB, 8 32GB, 8 64GB, 8 x 2 (with risers) Cost $2,056 $5,049 $5,087 $7,897 Technology Industry