And the answer to that is that you probably won't find having two CPU's useful at all, at least not if you do things right. The bang-for-buck numbers are greatly tilted in favor of single socket E5, such as the E5-1650 V3 on an X10SRL or X10SRW with 128GB of RAM. Seen ours here blowing around data at 6 gigabits per second and 85% idle.