Close look at the ASUS X99-E WS/USB 3.1 motherboard We also reviewed the X99-E WS when it first came out which was almost a year ago now, the X99-E WS/USB 3.1 is an updated version of that board with the included USB 3.1 ports. The things to look for is space between the SATA ports and case clearance. Over all this is not much to worry about and you should not have any problems fitting this board into most cases except very small ATX form factor cases. Normally we expect boards of this type to be in the ATX form factor but to fit in all the extra features ASUS went to a CEB size which takes the X99-E WS/USB 3.1 to 10.5 inches wide compared to ATX which is 9.6 inches. 5-Way Optimization by Dual Intelligent Processors 5.Form Factor CEB Form Factor 12 inch x 10.5 inch (30.5 cm x 26.7 cm).Supports 2/4-Way NVIDIA SLi and CrossFireX Technology.Realtek ALC1150 8-Channel High Definition Audio CODEC featuring Crystal Sound 2.ASMedia SATA 6Gb/s controller: 2x eSATA 6Gb/s port(s) compatible with 2x SATA 6Gbps ports.ASMedia SATA Express controller: 1x SATA Express port, gray, compatible with 2x SATA 6Gbps ports.Intel i210-AT 1 GbE & Intel i218-LM 1 GbE LAN ports.Up to 128GB DDR4, frequency up to 3200MHz (OC) 8x DIMM slots.Core i7 series, Xeon processor E5-2600 v3 Single socket R3 (LGA 2011) supports Intel 4th gen.ASUS X99-E WS/USB 3.1 with Retail Box ASUS X99-E WS/USB 3.1 motherboard Key Features With a larger CEB form factor, the LGA2011-3 platform has significantly more room to expand. This motherboard is an updated version of the X99-E WS which now adds USB 3.1 to the boards impressive feature list. Today we move up to the next size board which is the ASUS X99-E WS/USB 3.1 motherboard. In our last review we looked at the ASUS X99-M WS Motherboard which we found to be a very capable motherboard in a Micro-ATX form factor.