Asus' X99-M WS mobo makes for bite-size workstation builds
 

Asus has officially released its X99-M WS microATX motherboard. This pint-sized workstation board plays host to both Core i7 and Xeon E5-2600 Haswell-E CPUs. Four DIMM slots handle up to 64GB of RAM, and ECC RAM support is available if you're using a compatible Xeon CPU. Four PCIe slots (three x16 and one x1) make dual-SLI and CrossFire setups possible.

http://techreport.com/news/28699/asu...station-builds