CPU switch

I just picked-up a Q9550 to throw in my current system which is a P4 670@3.8ghz.
My question is: Do I have to re-install my OS ?
Currently running XP Pro 32. (I know, 64 is down the road
)
My question is: Do I have to re-install my OS ?
Currently running XP Pro 32. (I know, 64 is down the road
