AMD Motherboards - ASRock AB350M Pro4 R2.0 memVREF

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ASRock AB350M Pro4 R2.0 memVREF

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=17739
Printed Date: 09 Aug 2025 at 10:02pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: ASRock AB350M Pro4 R2.0 memVREF

Posted By: qweqwe321
Subject: ASRock AB350M Pro4 R2.0 memVREF
Date Posted: 08 Jan 2021 at 1:30am

AB350M Pro4 R2.0 BIOS ver. 2.0
Ryzen 5 1600 (8core)
Channel A1A2: DDR4 2x8GB GoodRAM (Hynix)
Channel B1B2: DDR4 2x8GB HyperX (Nanya)

Can you bring back opportunity to change memVREF voltage under AMD\PBS\ section of BIOS.
I need it to stabilize my 32 GB RAM - 4x8GB modules.

memVREF option is gone from latest BIOS version (I think starting from version 1.4).
Now I use bios version 2.0 (because it has better memory OC capabilities, and CPU P-states).

It's seems memVREF value calculated incorrectly if 4 memory slots are used.
If 2 memory slots are used (A2B2) then it's working OK.

I'm totally sure my RAM stability problems are related to incorrect memVREF value.

I tried to influence memVREF value (which invisible now) by changing SOC voltage - but with little gain.
SOC voltage has 50 positions to test (assuming safe voltage 0.9-1.2v). Multiplied by other modifications - like changing tCL, tRC, DRAM voltage, CUDBUS etc... it will be too many test conditions to check for stability.