How do I upgrade from 2 sticks of RAM to 4?

Hi William, I'm Rodrigo and I will help you This slot information means that your device supports 2 slots to install RAM and you are using only

To use two memory channels, you need to put a single stick into a motherboard RAM slot, and another single stick into a motherboard

ramses book golden nights slot RAM: CPM in ROM; AT&T 6300 with CPU 3 upgrade; AT&T 6300 PLUS B edit CASU Super-C - Z80 based with a 21 slot S100 bus

ram slot 2 not working I build computers and the RAM should always be in the first slot on the left closest to the CPU If there is a 2nd chip it should be installed