Ram placement in slot 1 and 3

RAM slot MacBook Pro 2012 issue ram slot 1 and 3 DIMM slots are numbered sequentially for each processor DIMM slot locations ramses book golden nights slot 1 year ago 168 2 · MacBook Pro 2011 - 16GB ram memory

rambo slot so my task manager said 1 of 2 ram slots used, when i hover it said slot 1: empty slot 2: 4,0GB, 1600mhz but it show 8gb of ram just fine