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How to change BIOS to UEFI?

SirFlamenco
By SirFlamenco
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Hi :) 

 

So a few days ago I build my pc but it seems that I can’t activate my optane drive and I only have half of my storage (2tb instead of 4tb). Now I know what’s the problem : I am not on UEFI, the only mode supported by Optane, and my also my drive is MBR. So now I want to change to UEFI, but I can’t seem to find anything online. I don’t care about losing my data and my motherboard is a z370 aorus gaming 5 with the latest bios.

 

Thanks!

So true it hurts

 

 

 

 

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https://www.gigabyte.com/Motherboard/Z370-AORUS-Gaming-5-rev-10#support-manual

 

Page 36

 

image.png.347cdef41b44531f4210a774fd2478be.png

 

Edit: Please note that CSM will need to be enabled. 

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The proper way is to configure the system correctly as UEFI.

But that requires some work that can end badly as it was not done properly the first time.

 

Technically speaking:

  • CSM should only be enabled if you have legacy hardware that does not support UEFI
  • UEFI should only be disabled (set to BIOS emulation mode often called 'Legacy'), when you are about to install Windows Vista or older versions of Windows, or if Windows 7 has issues with your UEFI, as it was picky (EFI was new on motherboards and so in Windows 7 took some revisions on motherboards and took Windows 8 to get it right).
  • Secure Boot should be enabled if you plan to install Windows 8 or newer or Ubuntu with UEFI support to ensure system security from rootkits attacks that set itself as an OS and boot first, than start your actual OS, and then it gain supervisor mode from the CPU and has 100% access to your system, can do anything, any time, knows every little thing that is happening by each program, keyboard, mouse, and other devices, and is impossible for you to detect it.

 

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22 minutes ago, GoodBytes said:

The proper way is to configure the system correctly as UEFI.

But that requires some work that can end badly as it was not done properly the first time.

 

Technically speaking:

  • CSM should only be enabled if you have legacy hardware that does not support UEFI
  • UEFI should only be disabled (set to BIOS emulation mode often called 'Legacy'), when you are about to install Windows Vista or older versions of Windows, or if Windows 7 has issues with your UEFI, as it was picky (EFI was new on motherboards and so in Windows 7 took some revisions on motherboards and took Windows 8 to get it right).
  • Secure Boot should be enabled if you plan to install Windows 8 or newer or Ubuntu with UEFI support to ensure system security from rootkits attacks that set itself as an OS and boot first, than start your actual OS, and then it gain supervisor mode from the CPU and has 100% access to your system, can do anything, any time, knows every little thing that is happening by each program, keyboard, mouse, and other devices, and is impossible for you to detect it.

 

On my system information it says that my BIOS mode is UEFI. What does that mean?

So true it hurts

 

 

 

 

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11 minutes ago, SirFlamenco said:

On my system information it says that my BIOS mode is UEFI. What does that mean?

It means that it is already set on UEFI.

 

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3 hours ago, GoodBytes said:

It means that it is already set on UEFI.

 

Is there any other way to know?

So true it hurts

 

 

 

 

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3 hours ago, GoodBytes said:

It means that it is already set on UEFI.

 

Is there any other way to check?

 

So true it hurts

 

 

 

 

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35 minutes ago, SirFlamenco said:

Is there any other way to know?

You check the UEFI settings to see if it is set to UEFI or Legacy

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1 hour ago, GoodBytes said:

You check the UEFI settings to see if it is set to UEFI or Legacy

1CC2C053-16BF-48BE-A9D5-43771DF8A57C.thumb.jpeg.6e5e128feed4832e8ce29527b9d59a38.jpeg

 

Is that UEFI or Legacy?

So true it hurts

 

 

 

 

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5 minutes ago, SirFlamenco said:

 

 

Is that UEFI or Legacy?

Well you motherboard supports a hybrid things. But if you want to make your system properly UEFI supported, CSM (Compatibility Support Module) should be turned off.

 

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3 minutes ago, GoodBytes said:

Well you motherboard supports a hybrid things. But if you want to make your system properly UEFI supported, CSM (Compatibility Support Module) should be turned off.

 

So I just turn it off and then voila? Optane activated and 4tb?

So true it hurts

 

 

 

 

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1 minute ago, SirFlamenco said:

So I just turn it off and then voila? Optane activated and 4tb?

I don't know how Optane works. All I am saying is that to have a fully UEFI compatible system, properly configured, CSM should be disabled.

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4 hours ago, GoodBytes said:

I don't know how Optane works. All I am saying is that to have a fully UEFI compatible system, properly configured, CSM should be disabled.

Ok I disabled it and it's working. Though I only have 2tb. Do you know how to change the current used drive from MBR to GPT or should I just create a new thread?

So true it hurts

 

 

 

 

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5 hours ago, SirFlamenco said:

Ok I disabled it and it's working. Though I only have 2tb. Do you know how to change the current used drive from MBR to GPT or should I just create a new thread?

Your 4TB drive shows 2TB when you have UEFI enabled? But if it is disabled, you have 4TB? Or it is always 2TB?

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1 hour ago, GoodBytes said:

Your 4TB drive shows 2TB when you have UEFI enabled? But if it is disabled, you have 4TB? Or it is always 2TB?

So to change to legacy I need to re-enable csm and change the two last bottom options of the picture I sent to legacy? Will that reinstall windows?

So true it hurts

 

 

 

 

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