My friend's computer keeps turning off by itself, which happens whether it's just sitting idle or when it's running tasks like Discord, YouTube, Spotify, or even gaming. It's frustrating because it can turn off after just a few minutes or go for several hours or even days without a problem. The shutdowns also occur while in BIOS. I've run stress tests with Cinebench R23 and the max recorded temperature was 81°C, which didn't cause a shutdown. A weird thing happens where the radiator fans spin super fast whenever it shuts down. I've done a few things to troubleshoot already:
1. I reapplied thermal paste (either Arctic MX-6 or Cryofuze Violet) and checked that the AIO cooler is properly installed. The pump is connected to the CPU_FAN header and the radiator to the CHA2_FAN.
2. The CPU_FAN is at full speed through Q-FAN controls, while CHA2_FAN is set to Standard.
Currently, the Fast Boot and XMP profile features are enabled, but even after disabling those, the computer is still shutting down. The components that were reused are:
- Motherboard: Asus Prime B450M-A II with BIOS Version 4632
- RAM: G.Skill 2x8GB 3000 MHz (it runs at 2666 MHz without XMP)
- Case: PowerGroup
Newly purchased components include:
- CPU: Ryzen 7 5800XT
- PSU: Thermaltake GF1 Fully Modular ATX 850W Power Supply
- GPU: ASUS RTX 5070 12GB
- Cooler: Cooler Master 240 Core II
- Storage: Crucial T500 1TB Gen4 NVMe
I also checked the system event logs and found some Kernel-Power events indicating a critical error. The temperatures are typically around 41-66°C when the computer is idle or gaming.
2 Answers
You mentioned using a 300W PSU before your upgrade, which might not have been enough power for the new components. Make sure the new PSU is functioning properly. If it’s a good model, you should be fine, but checking its voltage output might reveal any issues.
It sounds like you might want to check the power supply unit (PSU) because a faulty PSU can cause random shutdowns. Also, make sure there are no electrical issues in the house like flickering lights. Those can indicate a bigger problem. Just to be sure, it might help to test the PSU separately to see if it’s the culprit.
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