Freeware Descriptions:

CPU-Z is a free diagnostic tool that provides information on your CPU and some of the main devices of your system, including:

Here is complete features (taken from authors site):
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.

Memory:

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

System:

  • Windows and DirectX version.

What’s New in version 1.50:

  • Improved support for AMD Phenom II processor.
  • Support for NVIDIA 740i chipset.
  • Several bug fixes.

CPU-Z 1.50 Screenshot

File Size / OS:

  • 595 KB / Windows 9x - ME - 2000 - NT - XP - 2003 - Vista

Download CPU-Z 1.50: