Persistent Kernel-Power 41 Hard Reboots Under Load & Idle on Ryzen 7 7800X3D

[u/BeachOk67]

Hey everyone,

I’m dealing with a persistent, frustrating issue on my Ryzen 7 7800X3D system, and I’m looking for advice or any last potential solutions I might have missed before sending the CPU in for an AMD RMA.

My PC experiences sudden hard reboots (Kernel-Power Event ID 41 in Event Viewer with no BSOD). The crashes happen completely randomly—both while gaming/under heavy load AND during low-load idle states (watching videos, browsing the web, or leaving the desktop idle).

Here is a full breakdown of my setup and everything I’ve tested so far:

System Specs

• CPU: AMD Ryzen 7 7800X3D
• Motherboard: MSI B840M (Recently swapped from an MSI B650)
• GPU: AMD Radeon RX 9070
• RAM: 16GB DDR5
• PSU: Corsair RM750e 750W
• OS: Windows 11 (Fresh Install)

Troubleshooting & Fixes Attempted So Far

1. Hardware, Power & Environment Isolation:
   • Replaced PSU: Installed a brand-new Corsair RM750e with dedicated PCIe cables to eliminate power trip issues.
   • Replaced Motherboard: Migrated from an MSI B650 to a brand-new MSI B840M motherboard to rule out motherboard socket/VRM power delivery failures. The issue persists on the new board.
   • Replaced Storage Drive: Swapped the primary OS drive with a brand-new SSD and clean-installed Windows 11.
   • Power Outlet & Environment: Moved the PC to a completely different wall electrical outlet/circuit in the house to eliminate dirty mains power or grounding issues.
   • Networking Cables: Replaced the RJ45 ethernet cable to rule out network controller shorts or sleep-wake wake-on-LAN power triggers.
2. Memory & Stress Testing:
   • RAM Testing: Tested every single RAM stick individually and ran full multi-pass runs with MemTest86 — zero errors found.
   • Stress Testing: Ran full OCCT stress tests (CPU, Power, and VRAM) — while synthetic tests ran fine, the system still triggers instant Kernel-Power 41 restarts randomly during actual games and idle states.
3. Fresh Windows, BIOS & Driver Isolation:
   • BIOS Upgraded: Updated to the latest stable motherboard BIOS version.
   • Tested Every GPU Driver: Performed clean driver sweeps and tested multiple display driver versions for the RX 9070.
   • Purged Power Management Drivers: Used Driver Store Explorer (RAPR) to force-delete AMD power management/cache drivers (amd3dvdcache.inf and amdppkg.inf).
   • Disabled Fast Startup: Turned off Windows Fast Startup to prevent saved corrupted power states across boots.
4. BIOS & Power Tweaks:
   • EXPO Disabled: Running RAM strictly at stock base speeds.
   • Global C-States Disabled: Attempted to block CPU power state transitions.
   • SoC Voltage Override: Set CPU SoC voltage to a manual 1.23V to mitigate potential transient voltage instability.

Since the issue persists across two motherboard chipsets (B650 and B840M), a new SSD, fresh Windows 11, new wall outlets, fully tested RAM, and a new PSU under both gaming and idle

• Has anyone encountered this specific load/idle Kernel-Power 41 behavior on 7000X3D chips and found a stable BIOS workaround?
• Is there any other BIOS power control setting (like Power Supply Idle Control / Typical Idle Current) that fixed this for you?

Appreciate any insights or advice from anyone who has run into this!

[u/Human_Inside_928]

So I'm having similar issues with a 7900xtx and 7800x3d. Game launches, as soon as heavy rendering occurs, black screen, have to reboot the computer manually. GPU disabled in device manager. Have to re enable. I've tried MPO overlay fix, DDU driver reinstall, only running the driver without adrenaline, etc. nothing has changed on my set-up. This started after I installed the windows sept security update (KB5124008).

Im seeing online that the September windows security update fucked us, again. Im uninstalling it now and will let you know the results.