CPU-Z

"CPUID(CPU-Z) is a freeware that gathers information of CPU and other system devices."
CPUID(CPU-Z) is a freeware that gathers information on some of the main devices of your system.

CPU
-Name and number.
-Core stepping and process.
-Package.
-Core voltage.
-Internal and external clocks, clock multiplier.
-Supported instructions sets.
-Cache information.

Mainboard
-Vendor, model and revision.
-BIOS model and date.
-Chipset (northbridge and southbridge) and sensor.
-Graphic interface.

Memory
-Frequency and timings.
-Module(s) specification using SPD (Serial Presence Detect) : vendor, serial number, timings table.

System
-Windows and DirectX version.