Associate
Could still do with knowing the make of the psu. A cheapo 850w will not be delivering anywhere near that claimed power.
Like I said above, it's a Corsair, not 100% sure on the model number, but is just over a year old - X something or other.
Update motherboard bios, try a different PCIe slot
I'll try a different PCIe slot, after I've ruled out the PSU on the weekend, and mobo bios will be an absolute last resort I think.

