It would be an interesting test with a PC designed for the real gpu computing. I mean a pc with 2, 3 or 4 turbobox with 8, 12 or 16 GPU titan type or tesla or xeon phi.
A test for the pros, I'm a graphic designer and use iray for my render, I have 3 gtx 580 and I would buy 2 or 3 turbobox, but not having actual tests can not invest so much money without security of the result.
I do not know if by the editorial staff can perform these tests, but I would be grateful to anyone who was in possession of 2 or more turbobox send test with iray.
thanks
Luca