X670E PG Lightning Memory issue with EXPO
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=31051
Printed Date: 18 Jul 2025 at 12:03pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: X670E PG Lightning Memory issue with EXPO
Posted By: Stormrage
Subject: X670E PG Lightning Memory issue with EXPO
Date Posted: 01 Mar 2024 at 7:49pm
I face difficulty to set up my memory properly.
Setup:
MB: X670E PG Lightning
CPU: AMD Ryzen 9 7950X3D 16-Core Processor
Memory: Corsair DDR5 6000MHz CL30 Vengeance Grey EXPO (64GB 4x CMK32GX5M2B6000Z30) it is even on the list of supported memories
BIOS/UEFI: 2.08.AS01 (also tried with 2.02 initially)
If i use only 2 modules then EXPO profile works and runs at 6000 MHz, but as oon as i add another 2 modules then it crashes and can get working only at stock frequencies (3600?).
Is there any idea how I could get them running on their nominal frequencies?
I'm hoping some uefi update will fix this issue.
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Replies:
Posted By: Katana1074
Date Posted: 02 Mar 2024 at 4:38am
Hi There...
Booting with 4 dimms is very hard on the memory controller, official supported speed is DDR5-3600mt for 4 dimms, it can be done(I`ve done it myself at 6400mt),
Here`s a screenshot of my timings..
https://mega.nz/file/xuQShRoA#tpAR5KuD9ST-6Qto4La9_It0lNTXAaGEsK4KODoieKk" rel="nofollow - https://mega.nz/file/xuQShRoA#tpAR5KuD9ST-6Qto4La9_It0lNTXAaGEsK4KODoieKk
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CPU: RYZEN 7950x | Motherboard: ASROCK X670E TAICHI | GPU: MSI RTX4090 LIQUID X 24GB | RAM: FURY X DDR5 C40 | Hard Drive: INTEL OPTANE 900P 480GB,1 x SAMSUNG 980 PRO 2TB,2 X ADATA S8200X 2TB
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Posted By: Stormrage
Date Posted: 02 Mar 2024 at 4:45am
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Is there any tool that can help me find out the correct settings? I'm not really an expert on the topic.
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Posted By: Katana1074
Date Posted: 02 Mar 2024 at 7:32pm
Hi there...
there aren't any tools to config ddr5, however a lot of information and help can be found at :
https://www.overclock.net/threads/amd-hynix-ddr5-overclocking-guide.1801842/#replies" rel="nofollow - https://www.overclock.net/threads/amd-hynix-ddr5-overclocking-guide.1801842/#replies
It looks daunting, but once you get the basics right its a lot easier...
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CPU: RYZEN 7950x | Motherboard: ASROCK X670E TAICHI | GPU: MSI RTX4090 LIQUID X 24GB | RAM: FURY X DDR5 C40 | Hard Drive: INTEL OPTANE 900P 480GB,1 x SAMSUNG 980 PRO 2TB,2 X ADATA S8200X 2TB
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