I line up the ASRock H81 in the base of the rig and use the brass mounting points left over from a old standard ATX case to mount the mother board.

ASRock H81 is installed
ASRock H81 is installed

 

ASRock on Brass mounts
ASRock on Brass mounts

 

The EVGA 1300 and the Radeon 6970 are installed back into the Rig and cabled up

Building 6xRig 10
Building 6xRig 10

PCI-e raiser cables are used to connect the Graphics cards to the H81 and power on, reset and LED extension leads allow me to power on and see activity easily

Building 6xRig 11
Building 6xRig 11