AMD Motherboards - B650 PG Lighting + 8500G memory questions

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B650 PG Lighting + 8500G memory questions

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=110872
Printed Date: 10 Jun 2025 at 8:13am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: B650 PG Lighting + 8500G memory questions

Posted By: Petz
Subject: B650 PG Lighting + 8500G memory questions
Date Posted: 09 Jun 2025 at 4:56pm

Hi Asrock,

Curious to ask a few things about this motherboard and CPU combo. I?�m specifically interested in combining it with Gskill 2x32 kit, specifically the F5-6000J3636F32GX2-FX5. I?�m on the latest 3.25 bios.

Questions:

1. Per this post https://www.overclock.net/threads/expo-profile-doesnt-work.1816289/?post_id=29467023#post-29467023" rel="nofollow - https://www.overclock.net/threads/expo-profile-doesnt-work.1816289/?post_id=29467023#post-29467023 I was unable to POST with EXPO settings as the board seems to set bad override impedance values for ProcODT and RTTs. To get it to POST I just had to set these values back to ?�Auto??after enabling EXPO. While this kit doesn?�t seem to be on the QVL (it?�s on the B650E QVL though I think), this is still odd behaviour isn?�t it. Why would enabling EXPO change impedance from Auto? Is this something that should be fixed, as I imagine it will catch others?

2. I?�m looking to tune this memory and can?�t see any setting for ?�Tcke??in the memory timings. Why isn?�t this exposed?

3. For some reason, ?�Tphyrdl??which I beleive is trained (not usually exposed to user to set) is training at a high value of ??6??with my CPU. Yet someone with the same kit and board is getting a much better ??6??(per the above post). Why is this? Shouldn?�t the 8500G be training the same kit on the same board at similar settings when simply turning on EXPO?

Jarrod

Replies:

Posted By: darcmage
Date Posted: 10 Jun 2025 at 5:52am

I have the same board (3.25) and mem kit. It also has issues with EXPO. I can POST but experience the occasional crash. I tried EXPO @ 5800 and experienced one crash after a few days. It seems stable at 5600. I'll try going back to 6000 and setting impedance values to auto.