Once you have that, simply mount the second board, connect the chaining cable from the top to the bottom board (using the 2 closest 16 pin connectors), MOVE the 5-pin cable to the second board, and then connect the spare set of PCI-E cables to the new lower board.
-Phil
So, when daisy-chaining boards together, the 5 pin power connector needs to be attached to the LAST board in the chain?
If multiple boards are being supplied with enough power, how many could be PRACTICALLY chained together?