Q: The device randomly powers off instantly (no BSOD crash screen, no crash logs, no thermal throttling trigger—temperatures stay below 70°C at shutdown) under light loads such as web browser startup. However, it can run stable for days under full sustained load.
Limiting CPU frequency to 1.8GHz enables indefinite 100% stable operation. Allowing CPU frequencies above 2.0GHz reintroduces random sudden shutdowns.
A: Check the according CPU base and boost frequencies: boost clock up to 5GHz, base clock 3.4GHz. Based on the described symptoms, a motherboard hardware fault is highly probable. Reference CPU spec page: https://www.intel.cn/content/www/cn/zh/products/sku/217182/intel-core-i711390h-processor-12m-cache-up-to-5-00-ghz-with-ipu/specifications.html
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