AMD Opteron Server 4U/Twr/SATA/645watt power      Manufacturer: SuperMicro  Model Number: AW4020C-TB starting @ $3500   Description Processor/Chipset CPU Dual 940-pin ZIF Sockets Supports up to two Dual-Core AMD Opteron™ 200 Series processor(s) VRM x3 Chipset HyperTransport Link nVidia nForce Pro 2200 (CK804) nVidia nForce Pro 2050 (CKIO4) System Memory Memory Capacity Eight 184-pin DIMM sockets Supports up to 16 GB DDR 400 MHz memory or Supports up to 16 GB DDR 333 MHz memory or Supports up to 32 GB DDR 266 MHz memory Single or Dual(recommended) channel memory For Single CPU: Memory must be populated in the adjacent memory bank For Dual CPUs: Recommended that memory be populated equally in adjacent memory banks Memory Type DDR 400/333/266MHz buffered (registered) ECC SDRAM 72-bit, 184-pin gold-plated DIMMs DIMM Sizes 256 MB, 512 MB, 1GB, 2GB, 4GB** Memory Voltage 2.5 V only Error Detection Corrects single-bit errors Detects double-bit errors (using ECC memory) On-Board Devices SATA nVidia nForce Pro 2200 SATA2 Controller nVidia nForce Pro 2050 SATA2 Controller 8 SATA Ports nVidia RAID 2.0 SATA RAID 0, 1, 10 & JBOD support Network Controllers nVidia nForce Pro 2200 & 2050 Dual Port Gigabit Ethernet Controller Supports 10BASE-T, 100BASE-TX, and 1000BASE-T, RJ45 output Audio AC'97 audio CODEC with high quality 6-channel sound Front-side audio header Expansion Slots PCI-Express 2x PCI-e x16 slots 2x PCI-e x4 (using x8) slots PCI 3x 32-bit PCI slots Input / Output Serial ATA Integrated SATA2 Controller Eight Serial ATA Connectors Eight SATA hard drives supported IDE Dual ATA 133/100 EIDE channels support up to four UDMA IDE devices Floppy 1 Floppy port; 1.44 MB, 2.88 MB, 3-mode support LAN 2 RJ45 LAN port USB FUCI Up to 8 USB Ports 2.0 Compliant, 1.1 Compatible Audio 1 Line In / Line Out / Microphone ports Keyboard / Mouse PS/2 keyboard and mouse ports Serial Ports 2 Fast UART 16550 serial ports Parallel Ports 1 ECP/EPP parallel port Chassis Form Factor Tower / 4U Rackmountable Optional Rackmount Kit (CSE-PT26) Model SC743T-645 Dimensions Height 7.0" (177mm) Width 17.1" (434mm) Depth 25.5" (647mm) Gross Weight 63 lbs (28.6kg) Available Colors Beige, Black Front Panel Buttons Power On/Off button System Reset button LEDs Power LED Hard drive activity LED 2x Network activity LEDs System Overheat / Fan Fail LED Ports 2x USB Ports (2.0 Ready) Drive Bays Hot-swap 8x 1" SATA Hot-swap Drives Peripheral Bay(s) [90o Rotatable] 2x 5.25" Peripheral Drive Bay 1x 5.25" Bay For Floppy Drive Peripheral Drives Floppy Panasonic 3.5" 1.44MB Floppy Drive SATA Backplane SATA Hard Drive Backplane System Cooling Fans 4x 5000 RPM Hot-swappable PWM Cooling Fans Power Supply 645W Low-Noise AC power supply with PFC [ 24-pin, (4-pin, 8-pin) = 12V ]