I'm having a hell of a time trying to get the BAMT 1.2 eth0 drivers updated for the Z87 intel chipset... Tried for an hour and couldn't get it to work..

I too am going to try and run 7 R9 290's on an asrock z87 fatality board. Have you thought about windows idling the GPU's because they aren't hooked to a monitor?

I'm thinking BAMT is going to be the only way to do it. If only I could get the ethernet drivers installed....