What is DIMM and SO-DIMM Slot?

Ok to use 3 RAM sticks in this board? ram slot 1 and 3 In this article we explain what slots to put RAM in, and how to find the correct ones, whether you have a single, dual, or quad-channel ramses book golden nights slot RAM SLOT NOT WORKING FULL SOLUTION

ram slot 2 not working lshw -class memory tells you firmware, cache, and memory banks in detail IIRC, before my upgrade it reported bank:1 unused , and now it tells