Gigabyte B650 Gaming X AX V2 – Random Kernel-Power 41 reboots, mostly after idle/sleep – BIOS F41
Hi everyone,
I'm trying to diagnose a very strange intermittent issue with my PC and I found another post here describing something very similar with the same motherboard.
My system:
Motherboard: Gigabyte B650 Gaming X AX V2
CPU: AMD Ryzen 7 9700X
GPU: NVIDIA RTX 5070 12GB
RAM: Corsair Vengeance RGB 32GB DDR5-6000
PSU: Thermaltake Toughpower GT Snow 750W
Cooler: Aqua Elite 360 V3
Case: NZXT H6 Flow
Windows 11
BIOS: F41 (previously F34)
The problem:
The PC can work completely normally for hours or even days.
The issue seems to happen more often when the computer is left idle or goes into a low-power/sleep state rather than while I'm actively using it.
Originally, I noticed that sometimes I would leave the PC, it would go to sleep, and when I came back it would wake up as if Windows had completely restarted instead of simply resuming my previous session.
Event Viewer shows:
Kernel-Power Event ID 41
Recently I left the computer running for a couple of hours. When I came back, I moved the mouse and everything appeared normal — Windows was at the PIN/login screen.
However, when I checked Event Viewer afterward, I discovered that a Kernel-Power 41 had occurred while I was away and apparently the computer had rebooted itself.
There is usually no BSOD that I see.
The weirdest part is how intermittent it is. Sometimes the computer behaves perfectly.
Things I've already done/tried:
Updated BIOS from F34 to F41
Disabled Windows Sleep while troubleshooting
Disabled Hibernate
Disabled Fast Startup
Checked Windows Event Viewer
Investigated the NVMe/SSD as a possible cause
Investigated power/PSU issues
Checked connections
There was also one occasion where the PC would try to power on, the fans would spin for approximately one second, then it would lose power again. After disconnecting it for a couple of minutes and connecting it directly to the wall instead of the power strip, it started normally again.
That behavior hasn't been the normal failure mode, though.
What makes me suspicious of the motherboard/BIOS/power management is that I've found other B650 Gaming X AX V2 owners reporting very similar behavior — particularly crashes/reboots during idle or light loads, Kernel-Power 41, and in some cases NVMe issues depending on the BIOS version.
My questions:
Has anyone experienced this specifically with the B650 Gaming X AX V2, especially with a Ryzen 9000 CPU?
Could BIOS F41 / AGESA or AM5 low-power states be causing this?
Are there any BIOS settings I should test, such as Global C-State Control, Power Supply Idle Control, ErP, PCIe ASPM, or anything related to NVMe power management?
Before I start replacing hardware, I'd really like to determine whether this is a known motherboard/BIOS/power-state issue.
Any suggestions for specific logs, BIOS settings, or tests I should run would be greatly appreciated.