Athlon XP 2200+Thoroughbred, stepping 0 \Max. core temperature 85C
Athlon XP 2600+Thoroughbred, stepping 1 Max. core temperature 85C
X-Bit Labs (a reliable source IMHO)
The truth is, these chips run hotter than previous steppings, which had 70 or 60C limits. So, I think you are OK. I'm running mine at 52C at full load with a similar setup, see sig below.
