[SOLVED] Asus Prime Z390-A Max RAM

[XDmToter]

I am looking to upgrade the RAM on my Asus Prime Z390-A motherboard from 64GB to 128GB (I run lots of Virtual Machines...)

However, I am finding some discrepancies on Asus website.

This page lists the Maximum RAM for this board at 64GB:

PRIME Z390-A｜Motherboards｜ASUS USA

Unleash your tech prowess with PRIME Z390-A! Experience cutting-edge AI Overclocking, DDR4 4266 MHz, Dual M.2 for an enhanced user experience.

www.asus.com

While This page lists the Maximum RAM at 128GB:

PRIME Z390-A - Tech Specs｜Motherboards｜ASUS Global

Detailed specification of PRIME Z390-A Tech Specs，CPU: Intel® Socket 1151 for 9^th / 8^th Generation Pentium®/Celeron® Processors <br>Supports Intel® 14 nm CPU<br>Supports Intel® Turbo Boost Technology 2.0 <br>* The Intel® Turbo Boost Technology 2.0 support depends on the CPU...

www.asus.com

My CPU supports 128GB
https://ark.intel.com/content/www/u...9900k-processor-16m-cache-up-to-5-00-ghz.html


Does anyone know which of these Tech Spec pages are correct? Anyone here running 128GB in an Asus Prime Z390-A

I'd like to know before I go drop a bunch of $$ on RAM.

Thanks!

 

[Dj0gany]

https://www.asus.com/Motherboards-Components/Motherboards/All-series/PRIME-Z390-A/techspec/
says here it supports 128gb

 

[XDmToter]

The Manual says "You may install 2 GB, 4 GB, 8 GB and 16 GB unbuffered and non-ECC DDR4 DIMMs into the DIMM sockets."

That would limit it to 64 GB of RAM, so I'm why they have two different spec sheets showing two different MAX RAM numbers...

Maybe a BIOS update increased the DIMM support to 32 GB after the manual was written???

I see Version 1005 and Version 1105 both say "Improved DRAM compatibility." in the changelog, but I haven't found any more specifics.

 

[Zerk2012]

The Manual says "You may install 2 GB, 4 GB, 8 GB and 16 GB unbuffered and non-ECC DDR4 DIMMs into the DIMM sockets."

That would limit it to 64 GB of RAM, so I'm why they have two different spec sheets showing two different MAX RAM numbers...

Maybe a BIOS update increased the DIMM support to 32 GB after the manual was written???

I see Version 1005 and Version 1105 both say "Improved DRAM compatibility." in the changelog, but I haven't found any more specifics.

Memory QVL for 4X 32GB of memory, it's a download and I'm not downloading it.

PRIME Z390-A｜Motherboards｜ASUS USA

ASUS Prime motherboards are expertly engineered to unleash the full potential of AMD and Intel processors. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, these ASUS motherboards provide daily users and DIY PC builders a range of performance tuning...

www.asus.com

EDIT newegg also list the max as 64GB so I would contact Asus if you need 128GB .
https://www.asus.com/us/support/callus

 

[XDmToter]

I think I found the answer.

2020/02/20 update
PRIME Z390-A 32GB x4 MEMORY QVL
https://dlcdnets.asus.com/pub/ASUS/mb/LGA1151/PRIME_Z390-A/PRIME_Z390-A_32GB_x4_QVL_20200220.pdf

As of 2-20-2020 they have 32GB DIMMs on the QVL.