I didn't want to go into a lot of detail in my earlier post but there are two types of 2x4 connectors on f-18hornet's power supply. The CPU and the PCIE connectors. The PCIE connector is the one I showed in my post and the one that is supposed to be connected to the GPU.
Theoretically, the CPU connector shouldn't plug into the GPU card but theory doesn't take into account the quality of the connector's plastic and the enthusiasm of the gamer :) I probably forced the CPU connector into my GPU and I was thinking that f-18hornet might have done the same thing.
Someone else also had the same issue http://superuser.com/questions/1000679/i-plugged-an-8-pin-eps-cpu-cable-into-the-gpus-pci-e-port-is-it-damaged
Fortunately neither my card or the one in the link was damaged by this mistake.
(For accuracy purposes the PCIE connecter has an optional 2x3 configuration)