CPU-Z

CPU-Z can shows some information abut your computer to you.

The information Including :

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

CPU:
Name and number. 
Core stepping and process. 
Package. 
Core voltage. 
Internal and external clocks, clock multiplier. 
Supported instructions sets. 
L1 and L2 cache information. 
Location, size, speed, and technology.

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

System:
Windows and DirectX version.

Download CPU-Z.