PC troubleshooting starts with one question: what changed? A system that ran fine yesterday and crashes today changed something — a driver, a temperature, a Windows update, a setting in BIOS, or a part that’s slowly failing. This category covers the diagnosis side of PC ownership: post-failure debug codes, motherboard status LEDs, GPU temperatures that hint at fan failure versus airflow issues, CPU thermal behavior, and the white-light-on-motherboard symptom that means something specific on every brand. Each guide assumes you don’t want a generic checklist — you want to know what your symptom actually means, what the most likely cause is, and how to confirm it before you start swapping parts. Where temperatures are involved, articles include the safe ranges, the throttling thresholds, and the danger zones for the specific GPU and CPU generations covered. The goal is not “try this and see” — the goal is to narrow down the cause before touching the hardware. For boot-stage failures, check our BIOS Settings guides; for thermal problems, see Cooling & Airflow; for component identification, see Hardware Guides.
Normal GPU temperature ranges from 30-50°C idle to 65-85°C gaming. NVIDIA’s published maximum is 85–93°C depending on the card; AMD’s limit is 110°C on the junction sensor. Last updated: September 2026 What Is a Good GPU Temp? (Quick Answer) A good GPU temp is 30–50°C at idle and 65–85°C while gaming. Anything up to 85°C…
A good CPU temp is 30–50°C at idle, 60–80°C while gaming, and 70–85°C under full load, with thermal throttling risk above 90°C on most consumer CPUs. Last updated: September 2026 Quick Answer: What Is a Good CPU Temp? For a desktop PC under normal use, here’s the short version: idle should sit between 30–50°C, gaming…
Independent PC hardware guides written by builders, for builders. No sponsored rankings, no affiliate bias — just straightforward advice to help you make better decisions about your next build.