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Feature	C20x	C20	E30	S20	D20
Processors	Intel® Xeon®	Intel Xeon	Intel® Xeon® E3 Intel Core i3	Intel Xeon	Dual Intel Xeon
Preloaded operating systems	Genuine Windows® 7 Professional 64	Genuine Windows® 7 Professional 64	Genuine Windows® 7 Professional 64	Genuine Windows® 7 Professional 64	Genuine Windows® 7 Professional 64
Chipset	Intel 5520	Intel 5520	Intel® C206	Intel X58	Intel 5520
Supported memory types	1333MHz DDR3 ECC UDIMM 1333MHz DDR3 RDIMM	1333MHz DDR3 ECC UDIMM 1333MHz DDR3 RDIMM	For ECC: 2GB DDR3 1333MHz UDIMM 4GB DDR3 1333MHz UDIMM Non-ECC: 2GB DDR3 1333MHz UDIMM 4GB DDR3 1333MHz UDIMM	1333Mhz DDR3 ECC UDIMM 1066MHz DDR3 ECC UDIMM	1333MHz DDR3 ECC UDIMM 1066MHz DDR3 Non-ECC UDIMM 1333MHz DDR3 RDIMM 1066MHz DDR3 RDIMM
DIMM slots available	12	6	4	6	12
Total memory capacity	96GB	48GB	16GB	12GB	192GB*
Other supported operating systems	Genuine Windows® XP Pro 32-bit Genuine Windows® XP x64 Red Hat Enterprise Linux 5	Genuine Windows® XP Pro 32-bit Genuine Windows® XP x64 Red Hat Enterprise Linux 5	Genuine Windows® 7 Professional 32-bit Genuine Windows® XP x64 Red Hat Enterprise Linux 5	Genuine Windows® XP x64 Red Hat Enterprise Linux 5	Genuine Windows® XP x64 Red Hat Enterprise Linux 5
Graphics support Up to 2 NVIDIA®	2x NVIDIA Quadro®	2x NVIDIA Quadro	Integrated Graphics on Select CPUs: Intel Xeon: Intel HD Graphics P3000 Intel Core i3: Intel HD Graphics 3000 2D Professional Discrete Graphics: NVIDIA NVS295 256MB (2xDP) NVIDIA NVS300 512MB (DMS59 to 2xDVI) NVIDIA NVS450 512MB (4xDP) 3D Professional Discrete Graphics: NVIDIA Quadro 400 – 512MB (DVI, DP) NVIDIA Quadro 600 – 1GB (DVI, DP) NVIDIA Quadro 2000 – 1GB (DVI, 2xDP)	2x NVIDIA Quadro	2x NVIDIA Quadro
GPU computing support	NVIDIA Tesla™ C1060	NVIDIA Tesla C1060	CUDA for NVIDIA graphics cards	NVIDIA Tesla C1060	NVIDIA Tesla C1060
Hard drive support	7,200 rpm SATA 10,000 rpm SATA 15,000 rpm SASSolid-state drive MLC type	7,200 rpm SATA 10,000 rpm SATA Solid-state drive MLC type	3.5" 7200rpm SATA: 250GB, 500GB, 1TB, 2TB 2.5" 10Krpm SATA: 150GB, 300GB, 600GB SSD MLC Type: 80GB, 160GB	7,200 rpm SATA 10,000 rpm SATA 15,000 rpm SAS with SAS adapter Solid-state drive MLC type	7,200 rpm SATA 10,000 rpm SATA 15,000 rpm SAS Solid-state drive MLC type
RAID support	0, 1, 5 (SATA only)	0, 1, 5 (SATA only)	0,1	0, 1, 5 (SATA & SAS)	0, 1, 5, 10 (SATA & SAS)
Network support	Dual Gigabit Ethernet	Gigabit Ethernet	Gigabit Ethernet	Gigabit Ethernet	Dual Gigabit Ethernet
Power supply	800W 80 PLUS® Gold	800W 80 PLUS Gold	280W (85% efficient, auto-sensing)	625W 80 PLUS Bronze	1,060W 80 PLUS Bronze
IEEE 1394 support	Yes	No	IEEE 1394A (firewire) 2-port PCIe x1 adapter	Optional via card	Yes
Audio output	HD 7.1	HD 7.1	Intel® HD audio interface (with Realtek ALC662 codec) / front and rear	HD 7.1	HD 7.1
On-board eSATA support	Yes	Yes	1 SATA (300 MB/s) 1 SATA II (300 MB/s) 2 SATA III (600 MB/s) 1 eSATA	Yes	Yes
USB ports	10	10	9	10	10
Acoustics Idle operating noise level w/SATA			24db	27db	24db
Environmental certifications ENERGY STAR and EPEAT® apply to select models only	ENERGY STAR EPEAT Gold GREENGUARD® 80 PLUS Gold	ENERGY STAR EPEAT Gold GREENGUARD 80 PLUS Gold	80 PLUS Bronze certified 85% GREENGUARD EPEAT Gold TCO certification	ENERGY STAR EPEAT Gold GREENGUARD RoHS	ENERGY STAR EPEAT Gold GREENGUARD RoHS 80 PLUS Bronze
Recycled plastic content System only	50%+ post-consumer	50%+ post-consumer	65% post-consumer	26% post-consumer 24% post-industrial	27% post-consumer 23% post-industrial

*Pending availability of 16GB DIMMs

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