http://www.cpuid.com/softwares/cpu-z.html#whatiscpuz
What is CPU-Z
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 instruction sets.
- Cache information.
- Vendor, model and revision.
- BIOS model and date.
- Chipset (northbridge and southbridge) and sensor.
- Graphic interface.
- Frequency and timings.
- Module(s) specification using SPD (Serial Presence Detect) : vendor, serial number, timings table.
- Windows and DirectX version.