CPU-Z (64-bit) gives you information such as processor name and vendor, core stepping and process, processor package, internal and external clocks, clock multiplier, partial overclock detection, and processor features including supported instructions sets. This program supports detection of the processor's core voltage, L2 bus width, support for two processors (in Windows NT or 2000 only), and memory timing (CAS Latency, RAS to CAS, RAS Precharge).
What's new in this version:
Version 1.66 can work with Intel Xeon E5-2600 V2, Core i3-4xxx, Core i7-3910K processors.
Intel Ivy Bridge-E/EP/EX support improved.
Intel Atom Bay Trail-T preliminary support.
AMD Opteron 3200 and 3300 series
ITE IT8603 and IT8623 SIOs (Asus FM2+ mainboards).
Microsoft Windows 8.1 (Windows Blue).
New version checker.