Dig deeper, Nelson..... HERE.
So, the M.2 SSD in a PCIe adapter (in a Z600) "is in the system and running buttery smooth. The Read write speeds are absolutley insane" according to Brian. I've no doubt it would work the same in a Z400, and have asked him for some added details, as you'll see.... this is a boot PCIe SSD drive, by the way. It sure seems that the hardware you buy makes a big difference.
The hardware I'm thinking of getting for testing is what Brian is using: Kingston HyperX Predator Half-Height, Half-Length (HH-HL) 240GB PCI-Express 2.0 x4 Internal Solid State Drive (SSD) SHPM2280P2H/240G (with HHHL Adapter), and you can find reviews and take a look: http://www.kingston.com/us/ssd/consumer/shpm2280p2
Scott
