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MSI KombustorOCCT
Free

Freeware from MSI and Geeks3D.

 Freemium

Free for individuals, with offerings for professional and business use.

Windows Windows, Linux
  • Heavy GPU load for stability and thermal testing
  • OpenGL and Vulkan tests
  • Stress testing, benchmarking and monitoring in one tool
  • Free for individual users
  • Closed-source freeware
  • Extreme load can push poorly cooled cards hard
  • Closed source
  • Professional use is a separate offering
Downloadable app Downloadable app
Closed source Closed source
License: Freeware License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 2, 2026

Checked September 23, 2026

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