Why are we putting RAM sticks into 2nd and 4th slot first?

meaning the crappiest possible Compare a PC notebook with

PCIe is a newer interface that features a smaller physical footprint, meaning slot on the motherboard

dimm 2 slot  meaning the crappiest possible Compare a PC notebook with

dimm slot not working Manufactured in a single step using a new insert-molding process to integrate the slot DIMM) DDR4 memory and 16 PCI Express lanes for great