https://bugzilla.kernel.org/show_bug.cgi?id=68571
--- Comment #16 from perry3d@gmail.com --- I forgot to say: the problem started after i switched my board & CPU a week ago. Now i use a gigabyte h87-hd3 board with an intel xeon e3-1230v3 CPU. Before it was an AMD CPU with an Foxconn A7DA-S board.
Maybe it has something to do with the switch from PCIExpress 2.0 to 3.0?