DELL PE2950 III 2U RACK Quad Core Xeon E5405 2.0GHz(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 PE2900 III Tower Two Quad Core Xeon E5440 2.8GHz(2×6MB cache 1333MHz FSB) 8GB 667MHz (4 × 2GB dual rank) RAM FDD DVD/CD-RW 8 × 3.5" Backplane 2 × 146GB 15K & 2 × 3.5" Flex Bay 2 × 146GB 15K SAS 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 DRAC5 2 × 930W PSU NBD

• Processor: x1 (up to x2) Intel Xeon 5440 2,83GHz/1333MHz Cache Memory
• Storage Controller: PERC 6i 256Mb BBWC(RAID 0/1/5/6/10/50/60)
• Hard Drive: None, up to 2x3.5” SAS or SATA
• Internal Storage: Up to 1.5TB via two 3.5” 750GB SATA

• Processor: x1 (up to x2) Intel Xeon 5430 2,66GHz/1333MHz Cache Memory
• Storage Controller: PERC 6i 256Mb BBWC (RAID 0/1/5/6/10/50/60)
• Hard Drive: None, up to 2×3.5” SAS or SATA
• Internal Storage: Up to 1.5TB via two 3.5” 750GB SATA