CPU-Z is a freeware that gathers information on some of the main devices of your system. Name and number.
Core stepping and process.
Internal and external clocks, clock multiplier.
Supported instructions sets.
Vendor, model and revision.
BIOS model and date.
Chipset (northbridge and southbridge) and sensor.
Frequency and timings.
Module(s) specification using SPD (Serial Presence Detect) : vendor, serial number, timings table.