Bios option mysteries

I've had a look at some of the bios on my computer and some don't seem to be covered (or at least don't seem to be covered).

I was just wondering what these did and recommended settings:

Memory hole

Direct frame buffer (enable and disable option)


I'll post a couple more later.

 

All new or uncovered bios options belong to This Post. This way, the forums are kept tidy.