OCCT comes from "OverClock Checking Tool". Here is a list of its features:

• Up to 16-core support ( for instance, up to a Quad-Kentsfield or an Octo-Conroe )
• Customizable tests ( Duration, Priority, CPU or RAM, ... )
• CPU and Motherboard detection
• Monitoring support through 3rd party application ( i.e. MBM5, Speedfan and Everest Ultimate Edition 3.50 or above )
• Can produce graphs showing temperature and voltages during the test : Unique feature !
• Multi-language support

MAJOR FEATURES:

• OCCT's main UI has been completly revamped
• Graphs now shows a 2nd line showing the CPU usage / FPS during the test.
• CPU usage is now instantaneous instead of an average since the start of the test
• OCCT now has 5 different tests. The descriptions are at the end of the changelog

USER INTERFACE:

• Entirely revamped - now based on tabs, and completly modular
• Now has a small help module - just move your mouse around OCCT's window, you'll see

MONITORING:

• The built-in engine has been updated - lots of new hardware are now supported
• Alot of bugs are fixed, included the famous "3 cores out of 4 detected"

GRAPHS:

• Graphs now shows a second line showing the CPU usage/FPS during the test
• A legend explains everything
• The test configuration is now entirely present in the graph's subtitles