Rubbish. I've done a complete motherboard swap going from SiS
chipsetted Athlon XP to an Intel chipsetted P4 and it didn't need a
repair install.
Rubbish my ass.
http://www.aumha.org/win5/a/wpa.php
Changing the motherboard
Installing a replacement motherboard will change the IDE controller, and
usually will mean that you change to a new, faster, processor. If the
processor is one with a serial number (Pentium III), then you lose a third
vote — including when you change to a processor with no serial number, such as
an Athlon. If you also add RAM, or if the motherboard is one with an on-board
SCSI adapter, that makes four or five categories now voting No — you would
need an unchanged NIC to avoid having to call in for reactivation. If the new
motherboard also has inbuilt video (and possibly even a NIC of its own!), you
run right out of Yes votes with this one hardware change.
Again, this doesn’t stop you from making such a hardware change, nor from
using Windows XP thereafter. The phone-in reactivation option was created for
just this type of situation. Also, this is an extreme example. Due to the
onboard features of some motherboards, this one hardware change is equivalent
to several changes at once.
What if I make too many changes?
If, on Windows startup, there are not the required seven Yes votes, the system
will, in the original version of Windows XP, only boot to Safe Mode. You will
be required to reactivate by a phone call to Microsoft. You will have to write
down a 50-digit number, call into the activation center on a toll-free number
that will be given to you, read and check back the number you recorded — and
explain the circumstances. In exchange, you will be given a 42-digit number to
type in. This will reactivate your copy of Windows.
What hardware gets checked?
The WPA system checks ten categories of hardware:
Display Adapter
SCSI Adapter
IDE Adapter (effectively the motherboard)
Network Adapter (NIC) and its MAC Address
RAM Amount Range (i.e., 0-64mb, 64-128mb, etc.)
Processor Type
Processor Serial Number
Hard Drive Device
Hard Drive Volume Serial Number (VSN)
CD-ROM / CD-RW / DVD-ROM