In simpler scenes, i4770 might come close to i3930, but in no way are they at equal perfomance in Vray :- ), wtf. I have both 3930k and 3770k (5perc. slower than 4770) and difference is exactly where it should be, close to 40perc.
Anyway, can anyone test it at current Xeon generation ? Is there any problem in perfomance scaling to dual cpus or xeon platform ? For example in 2x2867 E5 Xeons (16cores=32 threads).