Something else I didn’t know!
With the release of XP SP3 I assumed there was an x64 version but…
It seems this is not the case as XP x64 already has the V5.2 kernel and (something else I didn’t know) the x64’s SP2 release was 3 years later than the x86 version so it is much more up to date.
Confusing but that’s why you won’t see any SP3 x64 builds (at least for a while)!
XP 64 is an offshoot of server 2003 hence the different service pack levels.
Dave