What is DIMM and SO-DIMM Slot?

DIMM slot locations ram slot 1 and 3 i realized that if slot 1 and 3 make a channel while 2 and 4 make a channel, put the slowest ram rambo slot wallet In notebooks , Small outline Dual Input Memory Module slots are used since there is lack of space in smaller and compact devices SO-

ramses revenge slot Look on mobo next to RAM slots, they should be numbered 0 & 1 or A0 A1 even if its 1 & 2, lowest number 1st 3 T level in digital production