A:Answer Hi there! I believe this system uses the Z790 D5 motherboard, which can support DDR5 RAM configurations. The maximum amount of RAM that can be used for this motherboard is 128GB, but usually 16GB is enough to support everyday gaming/streaming. If you use this computer for editing, rendering, etc., then maybe 32GB or higher would be a better option for you. Do note that if you plan to upgrade your RAM, please make sure you're using the exact brand and configurations, as different brands/configurations can cause technical problems later down the line.