Supermicro A+ Workstation 4020C-TB (Black). Processor socket: Socket 940, Compatible processor series: 2x Dual-Core AMD Opteron™ 200, Motherboard chipset: NVIDIA nForce CK8-04 + CKIO4. Maximum internal memory: 32 GB, Supported memory types: DDR 400/333/266MHz. Hot-swap hard drive bays: 8 x 3.5" SATA. LAN controller: nVidia nForce Pro 2200 & 2050, Networking features: Gigabit Ethernet. Form factor: 4U