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Why pc shut down after a few hours of use

Tags: Hardware

Last week, my PC has been acting up. I can turn it on without any issues and use it for about 2 to 3 hours. However, after that, it suddenly shuts down. Then I try to restart it, it won’t turn on again. But if I give it a 20 to 30 minute break, it boots up fine and works properly. But it shuts down again after a few hours. I’ve tried everything – updating drivers, reapplying thermal paste, cleaning the PC, checking the temperature, and even resetting the PC. At this point, I’m assuming it’s a hardware issue, possibly with the motherboard or the psu, but I’m not certain. Is anyone have ideas?

PC Info:
CPU – AMD Ryzen 5 3600 6-core processor
Motherboard – MSI B450 gaming plus (MS- 7B87)
Ram – HyperX fury 8gb ddr4
HDD – WD 1 TB HDD
PSU – Corsair 450W PSU
GPU – Radeon RX 560

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In reply to Why pc shut down after a few hours of use

Just wondering if you ever resolved this issue.

Possible solution of “pc shut down after a few hours of use”

In reply to Why pc shut down after a few hours of use

It does sound like a hardware issue, and given the symptoms, it could be related to either overheating or the power supply unit (PSU). Here are some things to consider:

PSU issue: Your 450W PSU may be struggling to power your components, especially if it’s old or faulty. Over time, PSUs can lose efficiency. Try swapping it with a higher wattage or newer PSU to see if the problem persists.

Overheating: Even though you’ve checked the temperatures, overheating could still be an issue. Your system may throttle itself down or shut off to prevent damage. Double-check that your cooling system (fans, thermal paste, airflow) is fully functional and your CPU/GPU temperatures are stable under load.

Motherboard: If the PSU and temperatures check out, the motherboard might have a failing component, such as capacitors, which can lead to shutdowns after prolonged use.

RAM issues: You might also want to check your RAM sticks. Use software like MemTest86 to run diagnostics on your RAM, as faulty memory can cause shutdowns.

Testing the PSU first with a replacement might be the most straightforward next step.

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