A:Answer The motherboard is an ASUS Z170-K. The manual says you can install 2, 4, 8 and 16GB DIMMS in each of the 4 sockets (making the capacity 64GB). It came with 2x8GB DIMMs.There is a note in the manual that says "for system stability, use a more efficient memory cooling system to support a full memory load (4 DIMMs) or overlocking condition."