Based on the ATX form-factor, the P9X79WS uses a typical X79 motherboard layout. The socket LGA2011 is powered by a 10-phase Digi+ VRM, which is cooled by a heatsink that shares its heat with a VRM heatsink cluster over the memory VRM, and the one over the X79 PCH. There are eight DDR3 DIMM slots, supporting quad-channel DDR3 memory. All expansion slots are PCI-Express long-type, though the exact lane configuration is not known. The board is advertised with 4-way NVIDIA SLI and CrossFireX support, so at least four of those slots could be wired to the CPU.
Storage connectivity includes two SATA 6 Gb/s and four SATA 3 Gb/s from the PCH, two SATA 6 Gb/s from a discrete controller, and surprisingly, no eSATA. ASUS could have taken the opportunity to provide a more robust storage connectivity, maybe even drop in a discrete SAS controller. There are six USB 3.0 ports, two on the rear panel, four by headers. There are two gigabit Ethernet connections, both driven by Intel-made controllers. Firewire and 8-channel HD audio make for the rest of it. Expect this one to be among the more expensive socket LGA2011 motherboards you can buy from ASUS.