Basically it would be stupid when you buy a new board that is not Secure Boot compatible (marked with Win8 logo) as this implies that it is capable of UEFI 2.3.1. You don't have to enable it but you could if you want (to try it). If you get a new board without that logo it is basically 1 year older at least. I would always boot from SSD via UEFI but for full speed with Fastboot you need a gfx card that support UEFI GOP mode. I only know that latest cards from MSI have it (by default, firmware updates would DISABLE that feature). For others best search for that first. In case you use a card without UEFI GOP the board needs legacy boot fallback to initialize the GPU which is slower and you could never try SB (when properly implemented, some allow lagacy mode + SB which is in reality complete nonsense).