CPU-Z helps you being more informed about your hardware

CPU-Z gathers information about your computer`s hardware, with it you can know information about your CPU, cache, motherboard and memory. you can know very detailed data about your hardware like the CPU revision, latency of the RAM, core voltages, speed of the CPU, number of cores, Etc.
it supports most current and old hardware and its constantly updated so all new hardware will supported as well, even my crappy Pentium 4 with a 478 socket is supported as shown in the above screenshot (Yes my computer sucks...a lot).
CPU-Z is a simple but useful utility that will let you know more about your hardware, available to all versions of windows.


List of information you can know with CPU-Z:

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.

Get it at http://www.cpuid.com/cpuz.php