HELP!!! I have an ASUS X99-PRO motherboard and a Samsung 950 PRO and I'm unable to set it us as NVMe in the BIOS. I've tried everything I can think of and that section of the BIOS remains grey. I'm able to install Windows 10 to it and then the drive appears in the BIOS as Windows Boot Manager. What am I doing wrong? Better yet, what are the proper BIOS setting to have this drive recognized for what it is in the BIOS?

Please excuse the first, similar, errant post.