that's exactly what i asked them! I told them that I've seen references to different revisions of their motherboards that might not support v2 CPUs. I specifically asked which revisions do not support v2 CPUs.Can you reply to them and ask about the different revisions and see what their answer is? I would trust Supermicro more than them. Mrrackables aren't highly technical and they typically don't actually test this stuff from what most members here have said.
This is their response (i know, very short):
It does support V1 or V2 CPU.
Supermicro Computer's Technical Support