Oh I have missed that already, do I plug the EZ_PLUG1 with a PCI-E cable (6 pin)? And I am not sure where the EZ_PLUG2 is ?
Yes. EZ_PLUG1 is a 6 pin PCIe connector. The RIVE supports so many GPUs that the ATX12v connector alone cannot safely deliver the specified 75-150 watts per card. Thus, an auxiliary power connector is needed
EZ_PLUG2 is a 4 pin Floppy connector (4 pin Molex on Rampage 4 Formula). The manual states that this is to provide stable power delivery to the DIMMs, but it also seems to power the Ethernet port and a few other things as well.