Do you have to have the correct Sata Express cable to utilize the full Sata Express bandwidth ? Or, would a sata cable from the ssd to the Sata Express port (power to the ssd will be from the psu sata power) suffice ?
Just make sure you got a half decent sata 3 cable and youll be fine, also dont be suprised if you dont get max speeds on that interface, if the sata-e port is controlled by a a crappy onboard controller then you might not even reach sata 2 speeds (Marvell !!)