How can I programmatically determine my processor type?

Question

How can I determine programmatically whether my machine is an x86, x64 or an IA64?

Answer 1

cpu-z is the program you want, it will tell you which processor you have and what extensions it supports

Answer 2

On Windows Systems you can get the environment variable PROCESSOR_ARCHITECTURE. Here is an MSDN article explaining the values that can be returned.

PROCESSOR_ARCHITECTURE=AMD64
PROCESSOR_ARCHITECTURE=IA64
PROCESSOR_ARCHITECTURE=x86

Answer 3

In C#:

using System;
using Microsoft.Win32;

  class Class1
  {
    static void Main(string[] args)
    {
      RegistryKey RegKey = Registry.LocalMachine;
      RegKey = RegKey.OpenSubKey("HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0");
      Object cpuSpeed = RegKey.GetValue("~MHz");
      Object cpuType  = RegKey.GetValue("VendorIdentifier");
      Console.WriteLine("You have a {0} running at {1} MHz.",cpuType,cpuSpeed);
    }
  }

Answer 4

cat /proc/cpuinfo

Answer 5

What's usually more important than the underlying processor is what mode the OS is running in, in ADDITION to the processor that's installed on the host.

Examine the output of "uname -p" (or uname(2))

Intel adopted AMD's extensions for 64-bit instructions so a value of "x86_64" means you're running either an Intel or AMD 64-bit processor, otherwise you're running the regular x86 ISA.

Answer 6

In Java you shouldn't need to know. ;)

Answer 7

VBScript, checking the PROCESSOR_ARCHITECTURE environment variable:

Set oShell = CreateObject("WScript.Shell")
Set oEnv = oShell.Environment("System")
Select Case LCase(oEnv("PROCESSOR_ARCHITECTURE"))
  Case "x86"
    ' x86
  Case "amd64"
    ' amd64
  Case "ia64"
    ' ia64
  Case Else
    ' other
End Select

VBScript, using WMI:

Const PROCESSOR_ARCHITECTURE_X86  = 0
Const PROCESSOR_ARCHITECTURE_IA64 = 6
Const PROCESSOR_ARCHITECTURE_X64  = 9

strComputer = "."

Set oWMIService = GetObject("winmgmts:" & _
    "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")

Set colProcessors = oWMIService.ExecQuery("SELECT * FROM Win32_Processor")

For Each oProcessor In colProcessors
  Select Case oProcessor.Architecture
    Case PROCESSOR_ARCHITECTURE_X86
      ' x86
    Case PROCESSOR_ARCHITECTURE_X64
      ' x64
    Case PROCESSOR_ARCHITECTURE_IA64
      ' ia64
    Case Else
      ' other
  End Select
Next

Answer 8

Why do you need to know this?