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OCCT 9.1.2

OverClock Checking Tool

Free Download

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OCCT screenshotOCCT is a stability checking utility that was developed back in 2003, and was constantly updated since. It permits you to entirely test your PC's stability, using four different tests: CPU:OCCT and CPU:Linpack aimed at examining the CPU, GPU:3D for the GPU strength, and Power Supply, a mix of CPU:Linpack and GPU:3D to completely load your Power Supply.

Each test can be used indefinitely, or for a determined amount of time. You can even add an idle period at the start or at the end of a test, to better understand how your PC's temperature ascent from an IDLE state to entirely loaded, and the other way round.

OCCT also integrates a monitoring engine, offering you full readings of the PC's inner temperatures, voltages, and fan acceleration, and shows them both in graphs in real time and at the end of a test. If you are concerned about strength with the real time graphs, don't: even if they are very light, just concealing the graph panel will stop them from refreshing.

OCCT even defends your PC from overheating or damage by adding alarms you can change for each sensor: once you go over (or under) the alarm amount for a voltage, temperature, or fan speed, the test will stop to conserve your computer.


  • Includes various tests for PC performance and stability.
  • Integrates an advanced hardware monitoring engine.


  • CPU tests may take some time (at least one hour).
  • It's hard for beginners to fully understand of results.
Version 9.1.2
Developer | see all products from this developer
Product Homepage OCCT
License Free (Freeware)
Last Week Downloads 15
All Time Downloads 7,561
Filename OCCT.exe
Filesize 19.7MB
MD5 Checksum 96B6BB9064132015B4FEE069FA03A8DE
OS Support Windows All
Category Utilities

100% CLEAN Certification

BadgeOCCT has been tested by team against viruses, spyware, adware, trojan, backdoors and was found to be 100% clean. Our editors will recheck this software periodically to assure that it remains clean.


Old Versions

Software Date Added
OCCT 9.1.2 September 24, 2021 - Latest Version
OCCT 8.1.0 April 13, 2021
OCCT 8.0.2 April 05, 2021
OCCT 7.3.2 February 11, 2021
OCCT 6.2.2 September 21, 2020

Download the free OCCT