guy that's very bad info, do you even know what those molex on the mobo are for? I bet not! those are to provide some supplemental power to the gpus when you are NOT using POWERED risers, under certain conditions it will send extra power to the riser which is already getting power and fry some hardware, I suggest you unplug them. those are for if you are using unpowered risers

I have this very h81 motherboard and do not have them plugged in and hmm mobo runs without them just as the version before it did, which I also have