Use the System Information (msinfo32) tool on Windows to find your motherboard and CPU model.
Desktop motherboards usually have 4 slots, while laptops (using smaller SO-DIMMs) often have only 1 or 2. 2. Determine Capacity (How Much?) Don't WASTE Your Money! How To Buy RAM Right Now how to buy ram
This is the most critical check. DDR5 RAM will not fit into a DDR4 slot and vice versa; the physical notches are different. Use the System Information (msinfo32) tool on Windows