Is this system 32 bit or 64 bit?

-4

I would definitely say that this system is 64 bit but the owner says it's 32. The computer is a Dell Optiplex 960 which comes both in 32 bit and 64 bit versions but I installed windows 8 64 bit version and it can run 64 bit programs.

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Update

There's Autoit script that checks it, I had to update an older script to make it work

If @CPUARCH = "x86" Then
    $CPUARCH = "32-bit"
Else
    $CPUARCH = "64-bit"
EndIf

If @OSARCH = "x86" Then
    $OSARCH = "32-bit"
Else
    $OSARCH = "64-bit"
EndIf

MsgBox(0, "CPU info", "The CPU is "& $CPUARCH & " and the OS is " & $OSARCH)

I uploaded the compiled binary to sourceforge.

Niklas

Posted 2013-06-02T00:48:55.927

Reputation: 753

10If you installed a 64-bit operating system you already know it's a 64-bit processor. The fact the owner had a 32-bit operating system installed doesn't make him wrong. – Ramhound – 2013-06-02T00:53:41.523

5split the difference - it's a 48 bit system :-) – None – 2013-06-02T00:55:06.047

1The bit-ness of the 'system' depends on both the computer and the OS. It's always been a 64-bit computer... But if it had a 32-bit OS, it was a 32-bit system at that time. – Brian Adkins – 2013-06-02T01:53:33.933

Try this: http://superuser.com/questions/321988/how-do-i-determine-if-my-windows-is-32-bit-or-64-bit-using-a-command/322007#322007

– MaQleod – 2013-06-02T02:28:30.483

1Just hit the Windows+PauseBreak key and you will see if its 32/64bit. – avirk – 2013-06-02T02:56:11.740

@MaQleod That was good. it generated a small .exe that I could verify that both my CPU and my OS are 64-bit. – Niklas – 2013-06-02T07:32:05.753

@avirk that only tells half the story. You could have a 64-bit capable CPU but only have a 32-bit OS installed, and would only see 32-bit (x86) there. – Austin ''Danger'' Powers – 2013-06-02T08:13:36.767

Why bother asking. If it runs 64bit programs the cpu is definitely 64bit. It is irrelevant if you have a 32bit OS or a 64bit OS. – w4etwetewtwet – 2013-06-02T08:16:40.247

@handuel if it runs 64-bit programs, then it's also a 64-bit OS. – gronostaj – 2013-06-02T08:53:17.597

I have the same processor Core 2 Duo, and this type is x64 as i know – Gio – 2013-06-02T15:38:45.167

Answers

64 bit processor - according to cpu-z it supports EMT64T - this is intel's version of the x86_64 instruction set. Probably had a 32 bit OS pre-installed - I think that was the period of transition between vista and XP, and while vista had proper 64 bit support, XP64 was a mess. There's a lot of systems that can handle 64 bits, but have 32 bit OSes installed.