DELL PE840 Dual Core Xeon 3050 2.13GHz(2B cache 1066MHz FSB) 2GB ECC DDR2 667MHz (2 × 1GB Dual Rank DIMMs) FDD DVD/CD-RW 4 × 3.5" Hot-Plug Backplane 3 × 250GB 7.2K SATA HDD PERC 5/i RAID 256MB cache (SATA or SAS Hot-Plug HDD) 2x PCIe (x8 and x1) 2x PCI-X and 1x PCI 1Gb NIC 1 × 420W PSU

DELL PE2950 III 2U RACK Quad Core Xeon E5420 2.5GHz(2×6MB cache 1333MHz FSB), no RAM, no FDD, DVD/CD-RW, 1×6 Backplane 3.5", no HDD, PERC 6/i RAID 256MB cache (SATA or SAS Hot-Plug HDD), 2x PCIe x8 and 1x PCIe x4, 2×1Gb NIC, 1 × 750W PSU

DELL PE2950 III 2U RACK Quad Core Xeon E5420 2.5GHz(2×6MB cache 1333MHz FSB), 4GB FB 667MHz (2 × 2GB dual rank) RAM, FDD, DVD/CD-RW, 1×8 Backplane 2.5", 2 × 73GB 15K SAS HDD, PERC 6/i RAID 256MB cache (SATA or SAS Hot-Plug HDD), 2x PCIe x8 and 1x PCIe x4, 2×1Gb NIC, 1 × 750W PSU NBD

DELL PE2950 III 2U RACK Two Quad Core Xeon E5440 2.8GHz(2×6MB cache 1333MHz FSB), 8GB FB 667MHz (4 × 2GB dual rank) RAM, no FDD, DVD/CD-RW, 6 × 3.5" Backplane, 2 × 146GB 15K SAS HDD, PERC 6/i RAID 256MB cache (SATA or SAS Hot-Plug HDD), 2x PCIe x8 and 1x PCIe x4, 2×1Gb NIC, DRAC5, 2 × 750W PSU NBD

DELL PE2950 III 2U RACK Two Quad Core Xeon E5410 2.33GHz(2×6MB cache 1333MHz FSB), 4GB FB 667MHz (2 × 2GB dual rank) RAM, FDD, DVD/CD-RW, 8 × 2.5" Backplane, 2 × 73GB 15K SAS HDD, PERC 6/i RAID 256MB cache (SATA or SAS Hot-Plug HDD), 2x PCIe x8 and 1x PCIe x4, 2×1Gb NIC, DRAC5, 1 × 750W PSU NBD