Thermal throttling is when your CPU or GPU reduces its clock speed because it's overheating. It causes FPS drops that feel random and don't correlate with game load.
How to tell if you're throttling
HWiNFO64 (free) — run it alongside your game. Watch:
- CPU Package Power vs TDP limit
- CPU Frequency — if it drops suddenly mid-game, that's throttling
- "CPU Throttling" sensor — direct indicator
Task Manager won't show throttling. It shows CPU utilization, not frequency.
Common causes
Laptop: insufficient airflow, clogged heat pipes, dried thermal paste. Gaming laptops throttle under heavy load by design — check manufacturer's performance mode settings.
Desktop: case airflow, CPU cooler contact, thermal paste.
Both: high ambient temperature room.
Software-side fixes
Windows has a feature called Power Throttling that deliberately throttles processes it considers "background":
HKLM\SYSTEM\CurrentControlSet\Control\Power\PowerThrottling
PowerThrottlingOff = 1
Sometimes games get misclassified as background processes and get throttled even when in focus. This registry key disables the feature entirely.
Processor power management — check that your power plan isn't capping maximum processor state below 100%:
powercfg /query — look for "Maximum processor state" under the active scheme. Should be 100.
IzanagiOP sets PowerThrottlingOff and processor state maximums. Hardware thermal issues require physical intervention. https://terweb.lt/
Top comments (0)