Plextor released an update of its M.2 Express based PCI Express SSD, we review the M6e Black Edition. An M.2. SSD mounted onto a PCI Express 2.0 x4 slot could be interesting for many. Alongside an aesthetic overhaul this product will be available in 128 GB, 256 GB and 512 GB volume sizes, all powered by a Marvell controller. Plextor developed a PCI-Express based SSD that can reach performance in the 700 to 800 MB/s range. Plextor released the M6e PCI-Express SSD in a Black Edition, this product slides into your PCI Express slot. Really, it makes use of an M.2 PCI Expess SSD.