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Can I use 32 Bit Windows on 64-bit Intel/AMD Processors?

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LAN_403

Dr. Who

Thu Nov 23 2006, 04:58PM

Registered Member #326 Joined: Sat Mar 18 2006, 01:12PM
Location: Glasgow, Scotland
Posts: 66

I'm planning what components to use for my next PC. I currently have an Atlon 2000-based machine Running Windows XP Professional.

Question is, can I install and run my existing 32-bit XP Pro OS on the 64-bit Athlon X2 or the Core 2 Duo?

Bjørn

Thu Nov 23 2006, 07:10PM

Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058

The 64 bit architecture is common and for the most part compatible between the two processors, named AMD64 or Intel 64 depending on the manufacturer.

In 64 bit mode the processors support only 64 bit operation. In compatibility mode they can run both 32 bit and 64 bit code but does not support segmenting or 16 bit code. In legacy mode they support all the old features but does not support 64 bit operation.

By 64 bit operation i mean 64 bit addressing and the complete set of 64 bit instructions.

So most old and new operatingsystems should run fine.

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