Freeware Descriptions:
OCCT is a free CPU/memory stability test.
Here is complete features (taken from authors site):
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
What’s New in version 3.0.0:
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
What’s New in version 3.0.1 Beta 2:
- Romanian and Arabic languages Support
- GPU:Memtestis now compatible with Nvidia cards with more than 512MB under Vista (Should be fine until 4GB). It is due to a bug in Nvidia driver, they’re working on it at the moment.
- GPU:Memtest is 4 times faster and effectiveness has been improved
- GPU:Memtest can now, as it switched to Cuda 2.1, try to use as much memory as possible (this could not be due to a bug in Cuda 2.0 previously)

File Size / OS:
- 5.86 MB / Windows 9x - ME - 2000 - NT - XP - 2003 - Vista
Download OCCT 3.0.1 Beta 2: