Hello If you want to increase the RAM of this PC, we recommend you to replace the 2x16GB with 2x32GB to stay in dual channel. This will bring more performance. For example, this model is supported according to the QVL list of the motherboard: G.Skill Trident Z5 RGB (2 x 32GB, 6400 MHz, DDR5-RAM, DIMM) If you would like to look for other models, you can find the QVL list of the Asus motherboard here: https://www.asus.com/motherboards-components/motherboards/prime/prime-z790-a-wifi/helpdesk_qvl_memory?model2Name=PRIME-Z790-A-WIFI