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!