X670E Gaming Plus WiFi - Hanging fan speed and mysterious restart with new BIOS

liukke8158a02dd

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Apr 5, 2025
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Hello,

I bought this motherboard a month ago, it worked pretty well with a 9800x3D, 4x8GB Kingston Fury ram blocks and a 5080.
Recently I switched the ram to 4x16GB, still Kingston Fury and, since I thought it was a clever idea, I updated to the latest BIOS, version 7E16v1A.

Since then, a couple days, I've been having some weird issues. For starters, I forgot that the BIOS update resets all settings, so I went back to re-enable X3D mode and EXPO.
Then I noticed the fans weren't behaving properly and went back in the BIOS to put them back into PWM since they'd revert to DC.

Now, the moment I click on "Save and reboot", I can hear one fan (usually my rear fan, SYS_FAN6) going 100% and staying there. If I log into windows and open MSI Center, it tells me the rpms are actually low, and I can raise/lower them but the fan actually stays 100%.
Switching off and on the PC solves the issue...until I do another change in the bios.

On top of that, today I was browsing (youtube video in back ground, many tabs open on Edge) and the PC just rebooted, no bluescreen, just sound off, black screen, and new boot.
I suspected the new ram, ran a memtest which crashed, then swapped/reseated the ram and now the memtest passed without an issue.

Still, the fan problem persisted, until I reverted back to the previous BIOS, version 7E16v19. Now I can do changes and no fan gets stuck, everything is controllable.
I currently test the system again hoping there'll be no restarts/odd things.

Does anybody have an idea/tip on how to troubleshoot further?
I ran memtest on the single pairs of ram modules, then all 4 together, they all pass now, and I don't know how to "trigger" another episode.
Obviously the ram blocks are all EXPO certified.

P.S.
Funnily enough, the latest BIOS is supposed to "Optimized the memory compatibility of single rank (1R) under 2DPC configuration." which is my current situation...but dunno, it got worse?

Thanks a lot.
 
Sorry, I forgot to mention it.
All fans are PWM, so 4-pins.
I only have one hub for the CPU fans (because they are 6 in push-pull) but those fans always behaved correctly, then I have an AIO water cooler using a pump header and a SYS_FAN1 for a VRM fan, then two fans on the SYS_FAN2 and ultimately the rear fan on SYS_FAN6.

My problem is that I changed RAM and upgraded the BIOS at the same time, so it's hard to pinpoint who is the culprit here, I'd say the sticky fan points more towards the latter.

For now I have reverted to the older firmware and for now everything works properly.
 
MSI people are checking for this issue and for solution.
Please wait for updates, thanks
 
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