I was surprised to see my 3,1 squeak out a win vs a hex nMacPro D500 in the valley demo.
http://macperformanceguide.com/blog/2014/20140123_3-MacPro2013-UnigineValley.html
http://macperformanceguide.com/blog/2014/20140123_3-MacPro2013-UnigineValley.html