Does a motherboard have to support 64-bit or is it just the CPU?

Does a motherboard have to support 64-bit or is it just the CPU? Do I need to have both components to support 64-bit, motherboard and CPU. Or is it just the CPU that matters?
Asked by: Guest \| Views: 263

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Guest [Entry]

"To quote Microsoft (eh),

Windows XP 64-bit Edition requires a 64-bit motherboard and chip set,
available through Intel and several OEMs.

In general, it helps to understand how a 64-bit system differs from the 32-bit one.

The first couple of pages from this old article are also a good read,
64-bit computing in theory and practice AMD and Intel make the leap to 64 bits"