“The Asus Z7S WS features dual LGA771 sockets that support Intel Xeon 5000, 5100, and 5300 series processors of both the dual and quad-core varieties. The Z7S WS is built around the Intel 5400 and ESB2E chipset and supports 1600MHz / 1333MHz / 1066MHz / 800MHz front side bus speeds, it has six Fully-Buffered DDR2 DIMM slots, and a pair of Marvell 88E8056 Gigabit LAN jacks with teaming functionality. The Asus Z7S WS’ expansion slot configuration consists of two PCIe 2.0 x16 slots, one PCIe x16 slot with an x8 electrical connection, and single PCIe x1, PCI-X, and PCI 2.2 slots.