Ok Cool, first thing is disconnect the power on the two RAID drives, only leave the 840 Pro connected.
2nd thing to do is download the pre-install RST driver 220.127.116.116 and the full RST software package put the pre-install driver...
The driver will be released tomorrow. Addresses two bugs:
-Desktop instability with some Geforce 460/560 GPUs
-Some multiplayer avatar models are missing textures for faces and apparel in Assassins Creed IV