Windows 10 works well (M.2 Samsung 950 Pro on a Gigabyte GA-Z170X-UD5), but don't make the mistake I did of doing a default MBR-style format on the drive. Put t

Windows 10 works well (M.2 Samsung 950 Pro on a Gigabyte GA-Z170X-UD5), but don't make the mistake I did of doing a default MBR-style format on the drive. Put the BIOS in UEFI mode and make sure the drive gets formatted with a GUID Partition Table (GPT). With MBR the system would still take 30-60s to boot, but GPT reduced that to less than 10s. You may need to copy the install data to a USB drive to get it to work. Initially I burned the iso image to a DVD and but then that DVD drive wasn't bootable under UEFI. https://technet.microsoft.com/en-us/library/dn336946.aspx https://technet.microsoft.com/en-us/library/dn336946.aspx