just installed a Z87E-ITX with even XBMC Ubuntu or Openelec on a Msata drive (Intel and Samsung).

When playing 1080p movies, every 30 seconds, I have a 6 or 7 seconds video lag, which doesn't play as smooth as the other 23/24 other seconds.

When playing same movies, by booting the same OS on an USB drive, no problem, movies are permanently smooth and fluid.

So, the only difference is located in the booting OS storage : Msata vs USB flash drive

firmware 2.30, movies on a NAS.

Any idea?