you can't on any Intel chipset
I don't know why they fitted it to the IP35 & IP35-E at all - even the hungriest PCI-E card shouldn't be able to draw more than the PCI-E slot & it's own connector can feed it.While I really like the layout of this motherboard it would of been nice if the extra 4pin molex power socket was at the bottom not the middle of the board,