OCCT (OverClock Checking Tool) will let you benchmark, overclock, and monitor your system components.

It comes with four built-in tests aimed at checking CPUs, GPUs, and Power supplies. OCCT will also monitor through temperature, voltage, and fan speed, as well as system constants such as CPU Usage, Memory Usage, and FPS.

OCCT 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

Similar:
How to Use the Windows Memory Diagnostic Tool in Windows
Three Ways to Find Out How Many Cores Your CPU has
How to Check Your Memory (RAM) Speed, Available Slots and More
How to Fix Low or out of Memory Errors While Copying Files on Windows 10

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