If you can put a 7770 or 7850 in a quad system and run 3 wu's and only do gpu wu's it works like a charm. Also you cpu load never goes over 50% which keeps it nice and cool and it will use all the cores. This is the way I did with my 7850 system and the thing runs very cool. Also the system is very usable. You hardly notice and lag from it even with running 3 wu's on the gpu.