CPU-Z is a freeware that gathers information on some of the main devices of your system

Information available includes:

CPU:

• Name and number
• Core stepping and proces
• 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