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.
What Should to Do With Extra PCIe Slots? | SabrePC Blog
A motherboard comes with many PCIe slots. Additionally, the PCIe slots come in several configurations that determine how many lanes you have available on the slot.
Can anyone tell me why do my right ram slots do not work ...
DDR RAM slots are the physical connecting points through which the implementation of DDR RAM modules is done on a computer's motherboard.