Corsair HX750W, HX850W and HX1000W have nothing to do with other models from this same series. They use a complete different (and better, by the way) design using a DC-DC converter to generate its +5 V and +3.3 V outputs, like Antec Signature series and Seasonic M12D series. These HX models are manufactured by CWT, while other models from HX series are manufactured by Seasonic.