Yes, I'm running XP 32b and Ubuntu 8.04 32b with that.
I also had all those weird RAM timing issues, no boots so many times.

Is there any BIOS after 12 but before 13B2 you have?

My week 44 9600 was also CPU limited, could not downclock the NB on any board or BIOS while the others could (non BE).
Week 43 and 45 9500/9600/9600BE were all fine.

Good luck with the Barcy.. which one BTW?