Question Windows 11 & UEFI ?

[brad1138]

I just built a new system with a Ryzen 7800X3D & 9070 XT GPU.
I installed Windows 11 and everything is working well, but I noticed the BIOS is set to "Other OS" instead of UEFI. I thought you couldn't install Window 11 unless UEFI was on...

Can I just enable it, or would it be best to enable it and then reinstall Windows 11?

The only thing that is a bit off is the boot time. I enabled "memory context restore" and that helped a lot, but it still takes about 15+ seconds just to POST, ~30 seconds to the Windows login screen. Most others are saying their AM5 system fully boots in 10-15 seconds.

Build Specs
Motherboard: Asus B650E Max Gaming WiFi White
CPU: Ryzen 7800X3D
GPU: Asus Prime RX 9070 XT OC
RAM: Crucial Pro Overclocking 32GB (2 x 16GB) DDR5 6400 (PC5 51200)

 

[Lutfij]

Can I just enable it, or would it be best to enable it and then reinstall Win 11?
You might need to do a couple of things, besides set it to UEFI. You might have to also set CSM to disabled if it's enabled. If setting the BIOS to UEFI and CSM disabled causes issues, then you will need to reinstall the OS. Prior to your tinkering, you should backup any mission critical data off the OS drive(if you have any).

Asus B650E Max Gaming WiFi White
What BIOS version are you on for your motherboard?

 

[brad1138]

Can I just enable it, or would it be best to enable it and then reinstall Win 11?
You might need to do a couple of things, besides set it to UEFI. You might have to also set CSM to disabled if it's enabled. If setting the BIOS to UEFI and CSM disabled causes issues, then you will need to reinstall the OS. Prior to your tinkering, you should backup any mission critical data off the OS drive(if you have any).

Asus B650E Max Gaming WiFi White
What BIOS version are you on for your motherboard?

I updated to the most current.

 

[brad1138]

I have nothing important installed yet, I think I will just do a full reinstall. You would think the BIOS would default to UEFI enabled....

 

[brad1138]

I'm back. It seems to be booting a bit quicker.

It bugs me when there "might" be something wrong. Better to do it all over the right way.

 

[CountMike]

I'm back. It seems to be booting a bit quicker.

It bugs me when there "might" be something wrong. Better to do it all over the right way.

Can you post Disk Management screen cut ? If disk starts with a 100MB "Healthy (EFI system partition) it's in UEFI mode properly.

 

[SkyNetRising]

But I noticed the BIOS is set to "Other OS" instead of UEFI. I thought you couldn't install Win 11 unless UEFI was on...

You can check current BIOS mode in msinfo32.

 

[CountMike]

BIOS modes could be UEFI, CSM or Legacy. "Other OS" can be only in Secure BOOT options. Unless you used one of non-original W11 with "cheat code" it wouldn't let you install them in any non-UEFI mode.

 

[brad1138]

Can you post Disk Management screen cut ? If disk starts with a 100MB "Healthy (EFI system partition) it's in UEFI mode properly.

Sorry, too late. Thanks though.