the PC suddenly shuts down by itself while playing Warhammer 40K: Space Marine 2

Question

When playing Warhammer 40K: Space Marine 2, the PC often suddenly shuts down completely (like a hard power cut).

Only Space marine 2 have this kinda problem.

Hardware:

• GPU: 9070XT Sapphire Pure
• CPU: 7800X3D
• PSU: Seasonic PRIME PLATINUM 1200W
• RAM: G.SKILL F5-6000J3238F16G x2
• Motherboard: X670E AORUS PRO X

I’ve already tried:

• BIOS update
• Driver updates
• Re-seating all cables
• sfc /scannow DISM /Online /Cleanup-Image /CheckHealth DISM /Online /Cleanup-Image /ScanHealth DISM /Online /Cleanup-Image /RestoreHealth
• Temperatures are fine when it shuts down: CPU 70–73°C, GPU 60°C. I disabled RAM XMP/overclock, so it’s running at 4800 MT/s.

Event Viewer only shows Kernel-Power 41.

Answer 1

Hi. I'm David, and I'm happy to help you.

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This behavior can occur for several reasons. It is necessary to investigate.

Please export and share the log for analysis:

1. Press Windows + X and select Event Viewer;
2. Expand Windows Logs and select System;
3. In the Actions panel on the right, select Filter Current Log;
4. In Event level, check the boxes Critical, Warning, and Error and click on Ok;
5. Again, in the Actions panel, select Save Filtered Log File As and save in an easily accessible place.

Then, upload the file to the cloud (OneDrive), choose to share it, and get the link.

Post the link to the file here so I can have a look.

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Looking forward to your reply.

Answer 2

Thanks for the update.

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After few hours of play time at 80% power limit, the system is stable.

That pretty much confirms it. Since the system remained completely stable during hours of gaming at an 80% Power Limit, transient GPU power spikes were definitely tripping the PSU's protection circuit (OCP/OPP).

Running at 80% works great as a temporary workaround, but it does mean leaving a bit of GPU performance on the table. Here are the best long-term options:

1 = Instead of just capping the Power Limit at 80%, a light undervolt can be applied in AMD Adrenalin.

Lowering the voltage reduces overall power draw and smooths out those sharp transient spikes while keeping clock speeds high, restoring gaming performance without tripping the PSU.

2 = Seasonic PRIME units come with a 12-year warranty. I read that Seasonic is well aware of OCP sensitivity issues on older PRIME revisions paired with modern GPUs, and their support team often provides an RMA replacement.

3 = If a PSU replacement is ever considered in the future, look for an ATX 3.0 or ATX 3.1 compliant model. These newer standards are specifically designed to handle microsecond power spikes up to 200% of their rated wattage.

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Please let me know if you would like guidance on setting up an undervolt profile in Adrenalin, or if you have any questions.

Answer 3

Thanks for the update.

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Regarding the version number: what appears in Windows Installed apps (8.05.04.516) is usually normal. The installer package from the AMD website contains several sub-components (such as GPIO and SMBus drivers), and Windows registers the version number of an individual sub-component rather than the overall suite package version. The driver setup was successful.

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The behavior observed after enabling EXPO indicates that the recent shutdowns were likely caused by DDR5 memory instability when using EXPO profiles on the AM5 platform.

Simply toggling EXPO off in the BIOS can sometimes leave cached memory training parameters active. To completely reset the memory configuration and check system stability, please follow these steps:

1. Reset BIOS settings to default:

• Restart the PC and enter the BIOS setup.
• Select Load Optimized Defaults (usually F9 or located in the Exit tab).
• Save and exit without enabling EXPO for now.

2. Repair potential system file corruption:

• Right-click the Start Menu and select Command Prompt (Admin) or Terminal (Admin).
• Type sfc /scannow and press Enter.
• Allow the scan to complete and repair any files corrupted during previous sudden shutdowns.
• Then, restart (not shutdown) the PC.

3. Test the game again at default memory speeds (with EXPO disabled).

If the system remains stable with EXPO disabled, running the memory at full EXPO speed will require waiting for a future BIOS update from the manufacturer or adjusting memory settings (such as lowering frequency slightly) manually.

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Please let me know how it goes.

Feel free to ask any questions you may have.