You are good.
Once windows boots, you can install any chipset drivers from your new mobo cd.
If you change platforms that are similar enough to allow windows to boot consider yourself a bit lucky.
Normally, intel to intel works, and in this case, amd to amd works. It is switching that will usually not work.
With a motherboard change, you will need to activate windows within 30 days.
If your windows was retail or upgrade, you will have no problem.
If it was oem, you might need a new copy of windows. But... MS seems to be very lenient about reactivating with oem if you assure them that your copy is not used elsewhere.