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Nvidia System Monitor vs LACT: catalog facts
Nvidia System Monitor	LACT
Free Free and open source under the MIT license.	Free Free, with source code published on GitHub.
Linux	Linux, Command line
Graphical view of Nvidia GPU usage on Linux Lightweight Qt application	Supports AMD, Nvidia and Intel GPUs Graphical interface plus a CLI client
Only works with Nvidia cards and requires nvidia-smi Linux only	Linux only Changing GPU settings carries some hardware risk
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.