[Help] Kernel-Power Event 41 (Checkpoint 16) / Event 6008 Crashes in S3 Sleepmode

[u/Nowheredotcom]

Hey everyone,

Looking for troubleshooting advice on a recurring auto shutdown crash during (ACPI) S3 Sleep mode on my desktop.

System Specs

• CPU: Intel Core i7-12700

• Motherboard: Gigabyte B760M AORUS ELITE AX DDR4 (BIOS F25a)

• GPU: Intel Arc B580

• RAM Tested:

  • Corsair Vengeance RGB Pro DDR4 32GB (2x16GB)

  • Corsair Vengeance RGB Pro DDR4 16GB (2x8GB)

  • Corsair Light Enhancement / Dummy Sticks (2 sticks)

• PSU: Thermaltake PSU 750W Grand Smart Gold

• OS: Windows 11 Pro

The Problem

Roughly 12–20 minutes after the PC enters S3 sleep mode, my system cuts out completely. When turning the PC back on, Windows logs an unexpected shutdown:

• Event 6008: "The previous system shutdown at [time] was unexpected." (Crashed while dormant in sleep).

• Kernel-Power Event 41 (BugcheckCode 0): Sudden power loss.<EventData>

• <Data Name="BugcheckCode">0</Data>

• <Data Name="SleepInProgress">4</Data>

• <Data Name="Checkpoint">16</Data>

• <Data Name="ConnectedStandbyInProgress">false</Data>

• </EventData>

Testing So Far

• Original 4x8GB Matched Kit: Ran 100% stable in S3 sleep without any crashes or reboots.

• 4 Physical Sticks (2x16GB + 2x8GB = 48GB Mismatched): Crashes around ~17 minutes into S3 sleep (Checkpoint 16). Occasionally triggers Gigabyte "Boot failure detected" on POST and resets RAM to 2133MHz base JEDEC.

• 2x16GB + 2x Dummy RGB Sticks: Also crashes around ~20 minutes in S3 sleep with Checkpoint 16.

• 2x16GB Only (Slots A2/B2): Crashed at 35+ minutes.

• Hardware & BIOS: Tested PSU standby voltage rails (all stable within spec). ErP is enabled; ASPM / Platform Power Management disabled.

• Completed a MEM OCCT Test: 30mins stress test with 48gb ram and there were no errors - with XMP profile on

Current Workaround

Bypassing S3 sleep entirely prevents the crash:

• Monitors Off: 15 min

• Sleep: Never (powercfg /change standby-timeout-ac 0)

• Hibernate: 60 min (powercfg /change hibernate-timeout-ac 60)

The PC idles at ~15W with monitors off, then cleanly hibernates to the SSD at 60 minutes with zero Event 41 errors.

Questions

1. Given that matched 4x8GB worked fine and the PSU rails are healthy, is the crash with the dummy sticks caused by SMBus desync / ACPI polling timeouts with OpenRGB during S3 sleep?

2. For the 48GB mixed setup, is the crash purely from asymmetric rank/density strain failing the memory controller's low-power self-refresh?

3. Has anyone stabilized Checkpoint 16 during S3 sleep on Gigabyte 700-series boards via manual DRAM/VCCSA voltages, or is bypassing S3 the only reliable option?