H410M-HDV/M2

It could be a number of things, the lack of an iGPU, the fact that the 560Ti is
based on an outdated standard or simply a setting somewhere that needs to be
changed. I would guess a legacy compatibility (CSM) setting. As I said, fast boot is
notoriously temperamental, particularly when mixing older and newer hardware.

I don't understand why it still exists, outside of security reasons on
servers/workstations or where you may not want someone to be able to access
BIOS and boot options. for boot times, Windows has it's own "fast startup" mode
that has a much more significant impact on boot times and all too often does not
play nice with the fast boot option in BIOS. Then again, my systems tend to run
24/7 anyway so boot times are not a factor for me. With an NVMe boot drive my
system goes from power on to login screen in about 12 seconds anyway, without
any fast boot/fast startup options enabled.

If memory serves, all the BIOS fast boot option does is prevent network lookup,
drive searching and other bootup options from functioning, it also disables
keyboard, mouse and network input until the OS is loaded. In all, on a modern
system, it saves you about 2-3 seconds. Not worth the hassle of making it work or
dealing with it's quirks (needing to install an app to boot into the BIOS).

Enjoy the new build and feel free to ask any more questions you may have

Edited by Xaltar - 05 Feb 2021 at 8:32pm

Fastboot can be problematic. Personally, I don't see the point in it, it just makes
getting into the BIOS a pain. Is there a particular reason you want to enable it
or are you just after faster boot times?