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?
Solution 1:
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