How to get high memory capacity and high speed/low latency

[marcusob72]

I have the following

ROG CrossHair Hero x670e

AMD 7950x

64 GB 5200 MT/s DDR 5

I want to expand the memory capacity, but looking at the QVL it seems the MB only supports lower speeds, And I also read the AMD CPU  doesn't support full DDR 5 lanes at high speeds (not sure about this though ?)

What memory can I buy to have either 128 GB or 196 GB, with 5600 MT/s or above ? 

[Silent_Scone]

Hello,

The memory QVL maximum density at a given memory frequency is indicative of what's possible on the platform and CPU silicon. If a single kit does not appear on the motherboard QVL for those capacities at 5600MT/s, you will likely have a hard time getting this stable. You will need to weigh up whether you need that much memory vs how much performance is sacrificed for your workloads.

[marcusob72]

Thanks for the answer. So I guess I am asking even though maybe nothing is available right now, is it likely with non binary for example, that later a Firmware/BIOS update could allow higher memory capacity  on the 670e and 7950 ? Or is that it, this will be the max you can use on a AMD platform with DDR5 ? I'm wishing I had bought Intel now as their latest platforms seem to support more memory capacity.

[Silent_Scone]

4x48GB is supported [update to latest UEFI revision], just there are currently no validated kits above 5200MT.

[marcusob72]

ASUS  - will support be added in the future for higher capacity DDR  with Higher Speeds ie 4 x 48 GB @ 6000 MT/s for 670E ASUS ROG Crosshair ?

[Silent_Scone]

Hello,

Have you found any EXPO validated kits in that configuration and speed?

[crisgen]

I remember when I bought the crosshair x570 hero and 2 g.skill Trident Z Neo 3600Mhz (2x8Gb) kits. To have the stable system with the 4 slots occupied, docp active and the memories at 3600Mhz I had to wait for different versions of AGESA but in the end I got what I wanted.
I start again with the crosshair x670e extreme and 2x16Gb of G.Skill TridentZ Neo 6000Mhz ram and  wait again for the AGESA version which will allow me to buy another ram kit (the same as the first obviously). Maybe with agesa 1.0.0.9?
You can never have 196GB of RAM, the maximum is 128GB.
From extreme specs: 4 x DIMM, Max. 128GB, DDR5.
In my experience try to stick to the QVL by looking at the make and model of the expo certified kits for your motherboard I remember when I bought the crosshair x570 hero and 2 g.skill Trident Z Neo 3600Mhz (2x8Gb) kits. To have the stable system with the 4 slots occupied, docp active and the memories at 3600Mhz I had to wait for different versions of AGESA but in the end I got what I wanted.
We start again with the crosshair x670e extreme and 2x16Gb of G.Skill TridentZ Neo 6000Mhz ram and we wait again for the AGESA version which will allow us to buy another ram kit (the same as the first obviously). Maybe with agesa 1.0.0.9?
You can never have 196GB of RAM, the maximum is 128GB.
From extreme specs: 4 x DIMM, Max. 128GB, DDR5.
In my experience try to stick to the QVL by looking at the brand and model of the expo certified kits for your motherboard and remember that new ram kits will come out in September

[marcusob72]

Hi

Just to finish this subject, I did purchase 2 x 48 GB DDR5 5600 MT/s

G.Skill Trident Z5 NEO RGB Series (AMD Expo) 96GB (2 x 48GB) 288-Pin SDRAM DDR5 5600 CL40-40-40-89 1.25V Dual Channel Desktop Memory F5-5600J4040D48GX2-TZ5NR

I am running this at 5800 MT/s, and is it very very stable. I also was able (at last) to upgrade my BIOS from one that was 12 months old, to the latest. So I am very happy with this setup. Obviously if I can get 4 x48 at 7000 MT/s then another upgrade will be imminent.

[nomoreload]

I’m on 16x4 Hynix A-die 7200Mhz XMP running at 6000Mhz 28-36. After upgrading to 1602 it can’t run 6000 or 5600. New AGESA and BIOSes has extremely low memory stability for my 4xDIMM configuration.