I would like to create topic about increasing Mac Pro 3.1 drive speed. As all of us know, main disadvantage of MP 3.1 is SATA II speed limit. My Mac Pro is very slow with FCPX or Premiere (latest versions). I want to upgrade disk subsystem. After a lot of reading I understand that PCIe SSD adapter gives much more speed than 2xRAID0 SSD on standard bays. Surely, I need bootable Drive. What are the limitation of our PCIe lane? (I mean If we buy the fastest SSD's possibe, could we get max speed or it would be limited and there is no reason to buy 1200 mb/s or 1600 mb/s drives?) Is there are reason to buy M2 drives, instead of SATA III SSDs? As I understand these small SSD's gave better performance. By the way, I don't want to buy OWC products because of high prices. But I want to buy the best PCIe Sata adapter and drives (or, if after discussion we understand that it gives better performance - then I would buy PCIe with M2 drive). Is there reason to buy Samsung 950 M2 SSD to mainly use it in Mac Pro 3.1? (Also, in future desktop, when needed) Also, I want the SSD adapter to include SATAIII ports for additional drives. P.S. In any case sorry, English is not my native English (Russian is).