UEFI install vs legacy install

[MIRTAZAPINE]

I wonder how many of you here install windows by pure uefi mode rather than the default legacy. Do you have any problem installing any new hardware with uefi install?

I face alot of problem just getting pure uefi install for windows 8 like it could not update, it runs slow and glitchy. I only found the fix later is to disable Compatibility Support Module(CSM) in the bios menu to solve that and reinstall as windows is loading up legacy drivers causing errors. I currently don't have any pcie graphic card, I just wonder this would be a problem like having graphic card without CSM on just purely uefi mode.

 

[Aquinus]

My machine won't boot via UEFI if CSM isn't enabled or if UEFI is forced for all devices. In particular, my storage controllers aren't supported strictly through UEFI so, for me, I will use UEFI and GPT disks however, I do still have CSM enabled with a preference for UEFI init over legacy init. It seems to work okay for me, even back on Windows 7.

 

[MIRTAZAPINE]

My machine won't boot via UEFI if CSM isn't enabled or if UEFI is forced for all devices. In particular, my storage controllers aren't supported strictly through UEFI so, for me. I will use UEFI and GPT disks however, I do still have CSM enabled with a preference for UEFI init over legacy init. It seems to work okay for me, even back on Windows 7.

I don't think I can enable CSM for my motherboard without running into errors eventually, it just does not seem to like having uefi with csm on strangely. So everything went smoothly for your uefi install with CSM? By now I would thought uefi and uefi drivers would be the default option and legacy bios have its death but it does not seem like it.

Edit : Is this shown Uefi on your windows?

 

[Aquinus]

I don't think I can enable CSM for my motherboard without running into errors eventually, it just does not seem to like having uefi with csm on strangely. So everything went smoothly for your uefi install with CSM? By now I would thought uefi and uefi drivers would be the default option and legacy bios have its death but it does not seem like it.

Edit : Is this shown Uefi on your windows?
View attachment 68617

It's not the driver, it's the firmware/oprom. Much like GPUs have UEFI compatible BIOSes, I suspect that the SATA controller on my machine isn't because when I disable CSM, Windows starts to boot but then I get met with a "BOOT_DEVICE_INACCESSIBLE" BSOD. UEFI support starts at the firmware/bios level.

Disabling CSM probably would work so long as all the init devices required for boot are UEFI compatible. So for example, if I had a UEFI compatible PCI-E SSD card and use it for booting, I probably could disable it.

 

[MIRTAZAPINE]

It's not the driver, it's the firmware/oprom. Much like GPUs have UEFI compatible BIOSes, I suspect that the SATA controller on my machine isn't because when I disable CSM, Windows starts to boot but then I get met with a "BOOT_DEVICE_INACCESSIBLE" BSOD. UEFI support starts at the firmware/bios level.

Disabling CSM probably would work so long as all the init devices required for boot are UEFI compatible. So for example, if I had a UEFI compatible PCI-E SSD card and use it for booting, I probably could disable it.

I see. Thanks alot I am rather new to using uefi.

 

[Aquinus]

This is the setting that makes or breaks UEFI on my machine. Windows can't boot when the storage device is loaded with UEFI instead of the generic OPROM. Not exactly sure why but, that's how it works and it's also the BIOS default on my motherboard.

Edit: I also SP'ed. It's INACCESSIBLE_BOOT_DEVICE being the BSOD error I get when I switch that to UEFI first or even Both, UEFI First. Either way, my machine doesn't seem to like loading up storage as UEFI but, that could just be my storage controller and that way it works.