just so you now, if your running a raid config, then for boot you also have to boot your raid controller which takes a couple of seconds. tbh, your better off using just the 1 m.2 ssd. even then I think it has an extra device controller that makes initial boot times with m.2 drives a tad slower because its got to boot the device controller. but your just better off with 1 ssd if your after fastest boot times. barely any difference between raid0 950 evo m.2s compared to a single m.2 ssd. tbh, the ssd is now fast enough to a point where the only way to get load times faster is to go with a processor with better IPC and faster clock speed. only reason why you would really want to go raid m.2 is if you do like workstation stuff like video editing or opening large files for massive 3d projects or etc. its not really worth going raid0 with m.2 because your bottlenecked at the cpu. theyre that fast. if you youtube linustechtips and m.2 this will explain it in slightly more detail.