SUPERMICRO MBD-X9DRL-3F-O ATX Server Motherboard Dual LGA 2011 DDR3 1600 CPU Type: Dual Intel Xeon E5-2600 Series QPI: Up to 8.0GT/s Other Chipset: Intel C606 Number of DDR3 Slots: 8 x 240pin Maximum Memory Supported: 256GB ECC Supported: Yes Registered: Yes PCI Express x8: 3 PCI-E 3.0 x8