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

Why my laptop task manager show 1 of 1 ram slot used but i have 2 ram slot 2 and 4 Thanks Denis Kelley, all four memory sticks are the same brand, size and speed DDR3 1600MHz and any of the four work when only installing ramses legacy slot I tried to boot using only one RAM bar at a time in DIMM_A2, DIMM_B1 and DIMM_B2, but the PC wouldn't boot 2 RAM bars, one is DIMM_A1 and one in DIMM_A2 PC

ramses legacy slot You will find only one or a maximum of two RAM slots on most laptops The number of slots increases up to 4 for selective workstations or gaming laptops The

rama 888 slot Different types of RAM slots exist, such as DDR4 and DDR5, each compatible with specific RAM modules Modern motherboards usually come with 2-4 Compute · APU 6 nm AMD APU CPU: Zen 2 4c8t, 5GHz GPU: 8 RDNA 2 CUs, APU power: 4-15W · RAM 16 GB LPDDR5