B4989T68W8HR-SI - Four LGA 1207-pin sockets support up to (4) AMD 45nm Quad-Core OpteronTM 8300 series processors; - Support AMD Dual Dynamic Power Management (DDPM) feature; - nVIDIA nForce® Professional 3600 + 3050 (NFP 3600 + NFP3050); - (32) 240-pin DDR2 DIMM slots support up to 256GB registered DDR2 667/533/400 w/ ECC memory;up to 128GB; registered DDR2 800 w/ ECC memory; - (2) Low-Profile PCI-E x16 slots; - (2) Low-Profile PCI-E x8 slots; - (2) Low-Profile PCI-X 64/133MHz slots; - (8) hot-swap 3.5" SAS HDDs w/ RAID 0, 1, 1E support; - (2) GbE LAN; - (2+1) ERP1U 1,400W PSU w/ PFC, 80-PLUS; - Onboard iKVM solution.