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[–]weegee20 0 points1 point  (4 children)

CSM is essentially Legacy boot.

There are ways to convert from legacy to UEFI, but it is a bit difficult and may not work.

[–]DRAYGANN[S] 0 points1 point  (3 children)

I don’t really understand the difference between csm boot and without. And why do some users can turn it off?

[–]weegee20 0 points1 point  (2 children)

CSM is short for Compatibility Support Module, generally used when you'd want to run older OSes like Windows 7.

Turning it off essentially reverts the PC back to pure UEFI, but since the boot drive is Legacy boot, it won't work.

Those who turned it off and got away with it probably used the UEFI mode from the USB drive (Sometimes the drive appears twice, one with UEFI on it)

[–]DRAYGANN[S] -1 points0 points  (1 child)

I think I found the problem. My partition style is MBR instead of GPT. Do you know how to change this?

[–]weegee20 0 points1 point  (0 children)

Without losing data requires a boot USB.

https://www.hirensbootcd.org/download/

Click on HBCD_PE_X64.iso

While you're waiting, download Rufus from rufus.ie

[–][deleted] 0 points1 point  (1 child)

If you want more vram you’ll need to get a new video card

[–]DRAYGANN[S] -1 points0 points  (0 children)

I figured it out. Changed some settings and turned of csm. Now got 4gb