https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 22 Apr 2026 01:45:46 +0000 Fri, 08 Jan 2021 01:30:04 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=17739 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=17739&PID=82894&title=asrock-ab350m-pro4-r2-0-memvref#82894 Author: qweqwe321
Subject: 17739
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.
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