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#11
UEFI /EFI, (Unified Extensible Firmware Interface) is a standard firmware interface for PCs, designed to replace BIOS (basic input/output system).
What is UEFI? - Windows Help
In essence it's BIOS but not in ROM on the chip but on a special partition on BOOT drive. Old time BIOS (Legacy BIOS) provides just enough function to boot to that partition which takes over after that. Part of it stays in RAM so it could be modified on the fly. It also provides graphical interface for BIOS. On this MB it's pretty fundamental so I don't use it, except for looks there's not much to be gained.
How can I check if I'm using it? also can I switch back and forth between them to see if it makes a difference?
ALSO UPDATE: I bought 2 more sticks of GSKILL RAM. It is now still halving the RAM, shoving 8GB into hardware reserve, effectively cutting 16GB in half. So now I'm running 4 sticks of 4GB. Now I can use 8GB....... but half is still shoved in hardware reserved. LOL WTF
Well, did you check if you have that EFI partition ? also disk has to be in GPT not MBR, you can see all that in Disk Management.
In the BIOS, under Advanced Management there is a setting for EFI CD/DVD BOOT OPTION.
Options are NON-EFI. EFI and AUTO.