https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Tue, 26 May 2026 01:39:31 +0000 Tue, 16 May 2023 04:58:26 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=25888 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104846&title=x470d4u-cpu-and-memory-compatibility#104846 Author: eccential
Subject: 25888
Posted: 16 May 2023 at 4:58am

Correct. B450/X470/B550/X570 don't really matter, as the memory controller is on the CPU.]]> Tue, 16 May 2023 04:58:26 +0000 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104846&title=x470d4u-cpu-and-memory-compatibility#104846 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104843&title=x470d4u-cpu-and-memory-compatibility#104843 Author: bcordy3
Subject: 25888
Posted: 16 May 2023 at 1:28am

I figure the same ram compatibility will go for the X570D4U as well, since it just has a different chipset]]> Tue, 16 May 2023 01:28:21 +0000 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104843&title=x470d4u-cpu-and-memory-compatibility#104843 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104835&title=x470d4u-cpu-and-memory-compatibility#104835 Author: bcordy3
Subject: 25888
Posted: 15 May 2023 at 11:17pm

Thank you very much ]]> Mon, 15 May 2023 23:17:55 +0000 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104835&title=x470d4u-cpu-and-memory-compatibility#104835 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104829&title=x470d4u-cpu-and-memory-compatibility#104829 Author: eccential
Subject: 25888
Posted: 13 May 2023 at 5:47pm

Ryzen CPUs only support UNBUFFERED DIMMs.
However, PC PartPicker is wrong about 64GB limit. The board should run fine with 128GB (4x 32GB DIMMs).

I can't think of a better time to buy DDR4 ECC Unbuffered DIMMs, because they're cheap & easy to buy!

Here are some options:

https://www.kingston.com/en/memory/server-premier/ddr4-3200mts-ecc-unbuffered-dimm

https://www.crucial.com/catalog/memory/micron-did-agnostic
(Filter for "DDR4-3200" "ECC UDIMM" "VLP ECC UDIMM")

Then you can search the part numbers, or just go through "where to buy" links.
Sometimes Kingston will sell them directly. Looks like Micron will sell directly, also. Otherwise, you can order them from places like CDW. Compare prices, regardless.

Note if you install 4 Single-Rank DIMMs, they will run at 2933MT/s.
If you install 4 Dual-Rank DIMMs, they will run at 2667MT/s.
No need to buy slower DIMMs. Just buy 3200MT/s UNBUFFERED DIMMs, and the CPU/Board will do the right thing.

For example, I have a X470D4U and when I went from 2-sticks to 4-sticks of KSM32ES8/16ME (16GB Single-Rank), it auto-downclocked from 3200MT/s to 2933MT/s. My CPU is R3-3300X, so same IOD as 3900X. Note I'm using the latest Beta BIOS (4.26 Beta, AGESA 1.2.0.7).
]]> Sat, 13 May 2023 17:47:18 +0000 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104829&title=x470d4u-cpu-and-memory-compatibility#104829 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104817&title=x470d4u-cpu-and-memory-compatibility#104817 Author: Xaltar
Subject: 25888
Posted: 12 May 2023 at 5:59pm

According to Crucial it isn't compatible with your board:
https://www.crucial.com/compatible-upgrade-for/asrock/x470d4u

Their compatibility database is very useful if you haven't tried it.]]> Fri, 12 May 2023 17:59:15 +0000 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104817&title=x470d4u-cpu-and-memory-compatibility#104817 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104812&title=x470d4u-cpu-and-memory-compatibility#104812 Author: bcordy3
Subject: 25888
Posted: 12 May 2023 at 11:26am

Hi, I'm interested in using the X470D4U in my homelab vm host/nas build but am getting conflicting compatibility information from online sources and PC Part Picker.

This Serve The Home article says that the board supports 32GB ECC DDR4 2666 DIMMs, but PCPP is saying there's a ton of issues with the ram and the CPU. I want to confirm that the parts in my list will work together before I order them and I'm so far unable to find concrete information on what should work.
https://www.servethehome.com/asrock-rack-x470d4u-review-amd-ryzen-meet-server/

Here's my parts list, and below are the compatibility errors it shows:
https://pcpartpicker.com/list/PFbs9r
>Problem: 128 GB RAM exceeds the motherboard maximum of 64 GB.
>Problem: AMD Ryzen 9 3900X 3.8 GHz 12-Core Processor and Crucial CT32G4RFD4266 32 GB (1 x 32 GB) Registered DDR4-2666 CL19 Memory are not compatible.
>Problem: ASRock X470D4U Micro ATX AM4 Motherboard and Crucial CT32G4RFD4266 32 GB (1 x 32 GB) Registered DDR4-2666 CL19 Memory are not compatible.]]> Fri, 12 May 2023 11:26:51 +0000 https://forum.asrock.com/forum_posts.asp?TID=25888&PID=104812&title=x470d4u-cpu-and-memory-compatibility#104812