Haha nah I did consider the hdd but when listening with the straw technique you can hear it is coming from around the power cables of the gpu/southbridge area. And it is louder in person! Hence another reason I don't think it is "normal" coil whine as this happens at less than 60fps etc. Yeah, if it is the mobo then I will get a new one and sell this one on as I'm so bored of trying to rma stuff atm that I'd rather lose a bit of money :'). So you don't think it could be cpu or settings related (I think it is the mobo but don't want to pull it and swap if thete could be another issue).
if the cpu would make that amount of coilwhine that thing is going in smoke i swear
the only thing i can relate this sound to is
a fans bearings shaking, a old hdd, extreme gpu/chip coilwhine ( coilwhines can even get louder then that but its quite severe so u can RMA for this reason )
however it doesnt hurt to still try a different pci-e slot because the southbridge is connected with the pci-e slots maybe a whining pci-e still and another slot might not whine