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. Various advantages: The height of the components enables for typical cooling to occur under the provided motherboard radiators, in contrast to the 2 TB model's inability to accommodate such cooling due to the memory's support for PCIe 3.0. Below are some downsides: Recording speed: judging on the numbers that were revealed, as well as comments and reviews, I was anticipating a higher rate.