I added a couple of sticks of 8Gb memory to my motherboard recently.
I already had 4 sticks of 4Gb in slots A1, B1, C1, and D1, and I added the two new sticks to B2 and D2 as the manual suggested, but instead of the total memory increasing by 16Gb, it only went up by 4Gb.
The BIOS manages to...