For my MP 5.1 i'll need to add some fast hard drive space . It's got a bunch of drives inside already, so I'm looking at SSDs connected via PCIe cards , to gain some performance, too . I did some research , got a bit confused, but it seems to come down to this : most regular SATAIII based SSD m.2 blades like the Samsung 860 EVO use the required AHCI protokol . The are not the fastest offerings at 500ish read/write, but will at least support boot and plug into a number of cheap PCIe adapters like the Lycom DT 120/125 etc .. PCIe adapters for 2.5" SSds by OWC, Sonnett etc. are far more expensive than the adapters for m.2 blades, while the SSDs themselfes cost the same for 2.5" and m.2 form faktor . Faster solutions not limited by SATA, ACHI SSDs like some Kingstons and Samsung 951 models, are becoming rare and demand a premium . So, am I right to assume that the easiest and cheapest way to add a (full SATA / 2x drive bay speed) SSD to my MP 5.1, will be something like an Evo 860 m.2 with a Lycom PCIe adapter ?