Bios question on new build

I have a question about a proper bios setting after a new build of mine. I put in an NVME OS drive, an NVME media cache drive, an SSD media drive and a HDD storage drive. Well, it is a new build with UEFI and after realizing the importance after reading formatting them in GPT.

My question is about the bios section where it starts with Windows 10 Features. I have read many articles on this with many conflicting each other. What would you do and why?

Windows 10 Features -

Other OS

Windows 10

Windows 10 WHQL

What should I set as default?

CSM Support - enable or disable If I disable then it changes the following items and they are gone.

Storage Boot Option Control

Disabled

Legacy

UEFI only

Other PCI Device Rom Priority

Disable

Legacy

UEFI only

Network Stack dis or enabled

Windows 10
Computer Case - Fractal Design Define R5
Motherboar - Gigabyte AX-370 Gaming 5
CPU - AMD Ryzen 7 1700X
Memory - Corsair Vengeance LPX 32GB
Video Card - Gigabyte GTX 1050 Ti
PSU - EVGA SuperNova G3
Keyboard & Mouse Logitech MK550
OS NVME SSD - MyDigitalDiscount.com - 240GB BPX Series
NVME SSD Drive - MyDigitalDiscount.com - 480GB BPX Series
SSD Drive - Samsung 850 Evo 1TB
Storage HDD - Western Digital - WD Gold 2TB
Optical Storage Dr LG WH14NS40
PCI-E X4 adapter - Silverstone ECM20
CPU Cooler Corsair Hydro Series H100i V2
What do people on here do? Thanks.

you should set boot to uefi only, and if you want to use fast boot you need to turn on secure boot and load your keys.

So I don't want to disable CSM?

to boot with uefi, you need to disable CSM.

Okay. When I disable CSM the other options go away.
Storage Boot Option Control

Disabled

Legacy

UEFI only

Other PCI Device Rom Priority

Disable

Legacy

UEFI only

UEFI Only

I'm confused now. When I change to CSM disabled there is no choice for UEFI only. It goes away.

legacy support -> disable
csm -> disable
uefi/legacy boot -> uefi only
boot mode -> no legacy support
boot priority -> uefi first

Where is the legacy support? That is not a choice in my bios. When I disable csm, there is no optio for the ones listed below either. They disappear.

you have a screenshot of your bios ?

Here are two pics of the bios. One is when CSM is disabled. The other is when it is enabled.

the first one looks right, and if you want the uefi fast boot you need to enable secure boot after windows is installed, delete the keys, then generate the keys, then save and exit.

first one looks correct. hmmm, my x99 bios looks very different. lol.