User manual Asus PRIME B450M-A II (English - 34 pages)
The Asus Prime B450M-A motherboard supports up to a maximum of 64GB of DDR4 RAM spread across four memory slots.
Mainboard ASRock X570 Taichi - LDTech
On paper, the AsRock X570 Taichi sounds like a well-equipped X570 motherboard. All three of its PCIe x16 slots support ….
Mighty Mini-ITX: ASRock X299E-ITX/ac with 4 Channel DDR4 and 3xM ...
Motherboard: http://www.amazon.com/dp/B012N6LM1Y?ref_=pe_584750_33951330 This above mother board is a MicroATX board has 4 DIMM slots.