How to Connect Asus R9 285 to Corsair H850i?

While assembling all the parts of my new system I ran into a dilemma. The 6+2 PCI-E port on the power supply will only accept the 6 pin portion of a cable; there is no orientation that will allow the 2 pin segment to be plugged in. Since the opposite end of the cable is an 8 pin connection, I couldn't plug it into either of the two 6 pin ports that the graphics card requires. Based on some web searching, my initial thought was to just reverse the cable, that is plug the 8 pin end into the power supply and use the 6 pin end for the graphics card. This proved unworkable because the lip on the graphics card that the cable latches onto is centered on the upper 3 pins whereas the power supply cable is offset and won't securely catch onto the lip. Nor am I certain of the electrical ramifications of doing this. Asus provides an adapter with the graphics card that allows two 4 pin Molex connectors to be converted into a single 6 pin modular connector (not sure why two are needed when one Molex to one 6 pin modular adapters are available). That physically works, but the only cable provided with the power supply that has Molex connections only has a 6 pin connector at the power supply end. Not sure if that would work electrically. Going through my box of old items I found two 8 pin modular to 6 pin modular cables from an old Enermax power supply. Both ends of these cables can physically be plugged into the power supply and the graphics card, but I have no idea of whether the pin out of Enermax cables would work with a Corsair power supply. Does anyone have any ideas on how I should move forward with this connection? I don't want to make a mistake that burns out my graphics card or anything else.



Regards, Dan