Why my laptop task manager show 1 of 1 ram slot used but i have 2

SOLVED: Where is the 2nd RAM slot? - Asus Q551L Repair ram slot 2 and 4 It is also known as a random-access memory slot or dual in-line memory module slot 2 solid state drives or specialized expansion cards ramses revenge slot List of Motherboards with 4 RAM Slots: ASUS TUF Gaming B760M-BTF WiFi, ASUS ROG MAXIMUS Z790 HERO BTF, ASUS TUF Gaming Z790-BTF WiFi, GIGABYTE B650 Gaming X

ramses book golden nights slot For best RAM performance, you should only install identical RAM -same brand, model, and capacity So, rather than fitting one 8GB and one 4GB