This update also includes a small number of new functionalities, which do not significantly change customersâ experience with the operating system. This white paper summarizes what is new in Windows XP SP3.
I've had it for about 3-4 months. Haven't noticed anything really. Don't use office much so I can't compare.
One thing I know is the software for Intel motherboards won't work with SP3 yet. So you can't use the Intel Desktop Control Center where you can control fan speed and overclocking.
I believe the claim was "10% faster", right? I saw a report on SP3 vs. SP2 on some gaming frame rates... some games were a frame or two faster, others a frame or two slower.