Understanding and Troubleshooting Random PC Restarts Without Bluescreen Errors: A Comprehensive Guide
Introduction
Experiencing unexpected system restarts can be a frustrating issue for PC users, particularly when no Blue Screen of Death (BSOD) messages are displayed. This guide aims to help you understand potential causes behind such behavior and outline methodical approaches to diagnose and resolve the problem, especially when dealing with a recently built and high-performance system.
Case Overview
Consider a modern gaming and productivity PC with the following specifications:
- Graphics Card: ASUS GeForce RTX 5060 Ti DUAL OC (16GB GDDR7)
- Motherboard: ASUS TUF GAMING B650-PLUS WIFI (AM5 socket, DDR5 support)
- Processor: AMD Ryzen 5 7600X (without stock cooler)
- Cooling Solution: Thermalright Peerless Assassin 120 SE, Black ARGB
- RAM: Corsair Vengeance DDR5-6000, 32GB (2x16GB), with AMD EXPO and Intel XMP profiles
- Storage: WD Black SN770 1TB PCIe 4.0 NVMe SSD
- Case: NZXT H5 Flow (2024 model)
- Power Supply: Corsair CX650, 650W, 80 Plus Bronze
The Reported Issue
The system exhibits random restarts under various conditions:
– During gaming sessions (under load)
– During light tasks, such as browsing or idling
– Occasionally during the boot process
Key observations include:
– No BSOD or error screens
– System sometimes freezes or shows a black screen before reboot
– Temperatures for CPU and GPU remain within normal ranges (CPU & GPU under 90°C under load)
– Hardware monitoring tools (e.g., HWInfo) show stable voltages with no signs of CPU throttling
– Stress tests (OCCT) pass without errors
– BIOS settings were tested with different configurations:
– EXPO profile disabled (set to 4800 MHz)
– System voltages manually set to 1.2V for the SoC
– BIOS reset to defaults
– Event Viewer logs only Kernel-Power ID 41 and 6008, indicating unexpected shutdowns or power failures
– No minidump files are generated for further analysis
Potential Causes and Diagnostic Steps
- Power Supply Unit (PSU) Issues
- Even a 650W PSU can sometimes be insufficient or faulty
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