I was looking into getting a PCI-E M2 adaptor for my 3,1 and was browsing several models. what puzzles me is the huge price differences between adaptor. From Highpoint`s 600$ extreme to a 300$ QNAP QM2-2P10G1T, and all the way down to 30$ for a two space adaptor from Startech. Is this a case of higher price - higher performance ? Or are the known brands just overcharging? Intuitively I would belive performance was mainly due to the drives you put in the adaptor, not the controller card itself...