I will be installing Windows 7 on a 6 GPU Rig later this afternoon and would like to know a few things. First I need to know if one of the 6 RX-480 Video Cards needs to be installed directly to the 16x PCI-e Mobo slot, or can they all be installed to the (6) 16x Powered Riser Slots up top and then install Win 7? It is a Asus Asrock H81 BTC Mobo. I have the 6 GPU Mod ready since it seems it will be required to get all 6 GPU's running on Win 7. Any help/tips with this would be very much appreciated.