DELL PE2900 III Tower Quad Core Xeon E5420 2.5GHz(2×6MB cache 1333MHz FSB) no RAM FDD DVD/CD-RW 1×8 Backplane 3.5" & 1×2 Flex Bay no HDD PERC 6/i RAID 256MB cache (SATA or SAS Hot-Plug HDD) 1x PCIe x8 and 3x PCIe x4 and 2x PCI-X 2×1Gb NIC 1 × 930W PSU

DELL PE1950 III 1U RACK Quad Core Xeon E5420 2.5GHz(2×6MB cache 1333MHz FSB), no RAM, no FDD, 1×4 Backplane 2.5", no HDD, DVD/CD-RW, PERC 6/i RAID 256MB cache (SATA or SAS Hot-Plug HDD), 2x PCIe, 2×1Gb NIC, 1 × 670W PSU

DELL PE1950 III 1U RACK Two Quad Core Xeon E5420 2.5GHz(2×6MB cache 1333MHz FSB), 4GB 667MHz (2 × 2GB Dual Rank) RAM, no FDD, 1×2 Backplane 3.5", 2 × 73GB 15K SAS HDD, DVD/CD-RW, SAS 6iR (SATA or SAS Hot-Plug HDD), 2x PCIe, 2×1Gb NIC, DRAC5, 2 × 670W PSU

DELL PE1950 III 1U RACK Quad Core Xeon E5405 2.0GHz(2×6MB cache 1333MHz FSB), no RAM, no FDD, 1×2 Backplane 3.5", no HDD, DVD/CD-RW, SAS 6iR (SATA or SAS Hot-Plug HDD), 2x PCIe, 2×1Gb NIC, 1 × 670W PSU