by Eric Palmer
Sr. Application Engineer, Software Enabling Division

This API with example Windows* utility is useful for detecting IA-32 CPU characteristics including Hyper-Threading Technology, instruction set extensions like Streaming SIMD Extensions 2 (SSE2), and the processor's cache configuration. New multi-core technology support includes the ability to enumerate and map processor packages, cores, and logical processors to processor affinity masks - useful for tuning threaded applications for multi-core technology or Hyper-Threading Technology.

The WinCPUID API can be used seamlessly between your application’s build configurations for IA-32 and x64 platforms. For more information on the cross-platform use of the CPUID instruction, see How to Use All of CPUID for x64 Platforms under Microsoft® Visual Studio™ .Net 2005.

Also includes new C++ abstraction class "CWinCPUID" for easier use in C++ applications.

Installation produces a shortcut on the Start>Programs menu to access the source code, sample application, and the help file including the WinCPUID API documentation.

General interest, general application developer

Complete Project

C, C++

Hardware Systems: IA-32 platforms
Operating Systems: Microsoft Windows* XP, Windows* x64, Windows* Server 2003
Compilers: Microsoft Visual Studio* .Net 2005** or Visual Studio .Net 2003 ** Microsoft Visual Studio* .Net 2005** required for x64 platform support

Download the source code for IA-32 and x64 platforms [ZIP 3.6MB]. Updated October 2006
Download the x64 binaries (executables, DLLs, libs, and headers) [ZIP 4.8MB]. Updated October 2006