AMD Motherboards - B850M steel legend wifi EXPO issue

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B850M steel legend wifi EXPO issue

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=113356
Printed Date: 19 Oct 2025 at 12:09am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: B850M steel legend wifi EXPO issue

Posted By: ffletchs
Subject: B850M steel legend wifi EXPO issue
Date Posted: 16 Oct 2025 at 8:36pm

Hi, I'm trying to get 4 DDR5-6000 dimms to work in my ASrock B850M steel legend wifi.

DIMMS are 2 identical kits, 2x32GB, in total 128GB
G.Skill
F5-6000J3636F32GX2

I can get it working on DDR5 3800 and letting the bios train for very loose timings

if I try to load EXPO it wont post.

If I try to load EXPO and then sett all settings exposed in the bios back to auto and back to the slowest DDR5 speed, it wont post

Looks like there is a hidden setting when loading EXPO thats not compatible with mem or mobo

CPU is 9950x3D

can anyone help?

Replies:

Posted By: ffletchs
Date Posted: 17 Oct 2025 at 4:25pm

Seems to be a CPU limitation I wasn't aware of

https://www.amd.com/en/products/processors/desktops/ryzen/9000-series/amd-ryzen-9-9950x3d.html" rel="nofollow - https://www.amd.com/en/products/processors/desktops/ryzen/9000-series/amd-ryzen-9-9950x3d.html

Max Memory Speed
2x1R     DDR5-5600
2x2R     DDR5-5600
4x1R     DDR5-3600
4x2R     DDR5-3600

guess ill stick to DDR5 3600 or replace my 4 sticks with 2