Hmm, well, I did just order the mobo and CPU a few hours ago, and I ended up going with a E5-2660 v4. Forgive me for not understanding, but why would I have needed a v3? The mobo supposedly supports 2600 V4, up to 22 cores and 55mb cache which the 2660 v4 is well under at 14 cores and 35 mb...