Install with UEFI or not?

Hi there, I'm building a Win10 system on an Intel NUC6i3syk. I'm planning to follow Brink's tutorial to create a USB stick for installation of Win10 Home (I purchased an OEM DVD for the license.)

I'm not sure about UEFI, what is it, should I use it, etc.? Is there a page here or elsewhere someone could point me to that would explain a few things about it. Does UEFI just replace the traditional BIOS I'm familiar with from other builds? Or is UEFI an *option* I have with this system - like, I could choose to install via UEFI or via BIOS?

Any specific tips for someone who's built many PC's in the past but never one with UEFI? Or, maybe I have but didn't even realize it! LOL...

Thanks,
Kieran

UEFI is the replacement for legacy BIOS. The new computer will operate in UEFI mode by default so it's best to just stick with it. The big thing is to look at the SATA options in the UEFI and make sure it is set to AHCI and not IDE if there is a choice in UEFI.

Source: Microsoft

Many PCs now include the ability to use the UEFI version of BIOS, which can speed up boot and shutdown times and can provide additional security advantages. To boot your PC in UEFI mode, you'll need to use a drive formatted using the GPT drive format.

Many PCs are ready to use UEFI, but include a compatibility support module (CSM) that is set up to use the legacy version of BIOS. This version of BIOS was developed in the 1970s and provides compatibility to a variety of older equipment and network configurations, and requires a drive that uses the MBR drive format.

However, the basic MBR drive format does not support drives over 4TB. It's also difficult to set up more than four partitions. The GPT drive format lets you set up drives that are larger than 4 terabytes (TB), and lets you easily set up as many partitions as you need.

SOURCE NUC6i3SYK error on boot pxe. |Intel Communities

Enter the board BIOS and enabled “UEFI Boot” and disable legacy.

Save changes and exit bios.

Press F10 several times when the NUC is starting up, in order to get the boot menu.

From the drives listed, pick the UEFI / USB flash drive.