ASUS PRIME Z390-A
Motherboard, from 2018 43 hardware reports
Memory
Up to 64 GB
4 full-size slots
SSD slots
Coming next
Checked from separate sources
Upgradable
Yes. 4 slots, up to 64 GB seen working.
It takes DDR4-2133 full-size sticks (DIMM).
- Slots
- 4 DIMM slots
- Type
- DDR4-2133 288-pin DIMM
- Most seen working
- 64 GB in two or more machines
- Firmware says
- 64 GB maximum
- How sure
- 43 of 43 reports show this layout
See 16 GB DDR4-2133 DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 43 hardware reports of this motherboard. Sources and method. Updated 9 Nov 2026.
4 full-size slots
Illustration Questions
Can I upgrade the RAM in the ASUS PRIME Z390-A?
Yes. 4 slots, up to 64 GB seen working. It takes DDR4-2133 full-size sticks (DIMM).
What type of RAM does the ASUS PRIME Z390-A use?
DDR4-2133 full-size sticks (DIMM, 288-pin).
How much RAM can the ASUS PRIME Z390-A take?
Machines in the reports run up to 64 GB. That matches the 64 GB maximum the firmware reports.
Is this my motherboard?
The model name is printed on the board, usually between the memory slots or near the CPU socket. In Windows, open System Information and look at "BaseBoard Product"; it should read PRIME Z390-A.