I feel like a fool asking this but when I check Onboard Device Configuration looking to make sure PCIEx8_4 is set to M.2 it is not there only 8_2 and 8_3 show. I loaded optimized defaults 2x but it still doesn't show. My 960 Pro 512 boots Win 10 Pro fine (maybe a little slower than it should be). This is a ROG STRIX X99 GAMING MB with a 6850K. Current bios 1504 is loaded.