Ya i went from an AMD 2800 to a core2duo 6600 and new board, no reinstall. I then went from the c2d6600 to a c2q6600 and yet a different motherboard, no reinstall. I then changed from a b3 q6600 to my g0 q6600 and still no reinstall.
Its fast but the system just decided to turn itself off.
Maybe I'll just reinstall windows or try get the repair windows to come up at boot. What you think? I added another 512mb ram too so system is now single channel instead of dual.
Loaded up msdos via win98 boot floppy. After awhile the system went off again. I'm going to remove the extra ram I added and see if that sorts out the issue.
It's highly possible that the psu is the culprit. Most new cpus have a much higher demand for power than the older single core chips did. Also most cases come with a REALLY cheap psu.
I've changed a processor on a motherboard, many times, and I've never had to reinstall Windows. It's only when you change the motherboard, that you need to reinstall Windows.