Thanks cryptoillusion1, have edited it.

Re: lowering the clocks, although this will lower the power consumption it still won't address the issue that at the same clocks it is consuming more power than usual ie lower clocks will be consuming same power as the higher clocks were.

The other issue is that the original GPU 0 will only work in the 16x PCI-e slot if connected to any of the PCI-e 1x slots it fails to get picked up.