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B850M steel legend wifi EXPO issue

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ffletchs View Drop Down
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    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

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
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ffletchs Quote  Post ReplyReply Direct Link To This Post 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?
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