I needed an additional MEG B550 Unify-X board to install in the M2_4 (PCIe 3.0 x4) slot, so I went ahead and purchased one. The RAM is good for PCIe 3.0, and the height of the components allows for normal cooling to occur under the radiators that come supplied with the motherboard (this does not apply to the 2 TB version). With these drawbacks: Recording speed: judging on the numbers that were revealed, as well as comments and reviews, I was anticipating a higher rate.