You can get a quad CPU motherboard relatively cheaply:
http://www.ebay.com/itm/Arima-Quad-CPU-16-Core-AMD-Opteron-M...
Also don't forget to add the same costs for the Phi solution.
You can get a quad CPU motherboard relatively cheaply:
http://www.ebay.com/itm/Arima-Quad-CPU-16-Core-AMD-Opteron-M...
Also don't forget to add the same costs for the Phi solution.