My Z270 classified k has 4 intel sata ports and 4 Marvell sata ports. When I enable the Marvell controller in bios my computer takes a long time to boot up. I need at least 4 total sata ports along with 1 nvme slot. My nvme drive is installed on the bottom slot. For some reason I thought this is where it had to go to be nvme capable. But this disables 2 of the intel ports. Making me have to use the Marvell ports. Is the top m.2 slot a nvme capable slot that will run just as fast as the bottom slot with my Samsung 950 evo?