Asus Z170, Windows and CSM

[LowFatMom]

Havent built a new system in a longgggg time I was out of the loop for this one. I installed Win10 on a skylake machine with CSM enabled, and my friend told me I should reinstall windows with CSM desabled.

Is it only a boot thing? Should I really reinstall everything again without CSM?

 

[i7Baby]

csm is for booting from an external drive (?) https://aps2.toshiba-tro.de/kb0/TSB2B03F30002R01.htm

 

[VirtualLarry]

No, CSM (compatibility support module) is for booting an MBR-formatted internal or removable drive, on a UEFI BIOS.

 

[zir_blazer]

If you installed Windows with CSM enabled and a new HD, it should have formatted the HD with a MBR Partition Table and boots using BIOS Mode. You should have used UEFI-GPT, which may require CSM to be disabled (Or at least setting UEFI Boot as priority).
The only feature gain would have been Fast Boot, or Ultra Fast Boot if your Video Card has an EFI capable PCI Option ROM.

 

[LowFatMom]

If you installed Windows with CSM enabled and a new HD, it should have formatted the HD with a MBR Partition Table and boots using BIOS Mode. You should have used UEFI-GPT, which may require CSM to be disabled (Or at least setting UEFI Boot as priority).
The only feature gain would have been Fast Boot, or Ultra Fast Boot if your Video Card has an EFI capable PCI Option ROM.

Yeah, I went with a full UEFI install with CSM disabled, better now with a fresh windows install with only a few apps installed than in 1month.

I was kind of amazed of it took about 10min with a usb drive to install. And that was only usb2 !