Abwx,
If AMD releases a Athlon x 4 version of Carrizo, how high do you think it would clock? @ what power consumption levels?
There will be no such chip because it doesnt really make sense if it has no GPU, in respect of Kaveri and if AVFS work as expected it could reach 3.2 at 28-30W for the SoC.
3.6 will get you to 45-50W, you can see that it s not designed for frequencies significantly above 3.0 with all cores loaded, at this TDP a slightly undervolted Kaveri will be about as good.
If we look at Planet 3D 7650K review they got 46W at most (under X264 loading) at stock with 28.5% voltage margin, reducing the margin to 16.8% would get it down to 38W at its stock 3.3Ghz.
16.8% voltage is almost server class requirement (20% minimum for servers), the fact that Kaveri is also used as embedded chip can explain the higher than usual stock voltage margins, in such usages stability is much more important than for consumers products, hence efficency is traded for this critical parameter, just imagine how it is important for chips used in industrial environments, let s say in chemical plants...