thats pretty damn sweet for air cooling. i remember (back in the day...) the most i could get out of my 650 duron was about 1.1-something before it would just slam dunk my ass to a BSOD. and that was with a dual 80mm fans through a ducted copper skivved block (that cost about £60 at the time, second hand!) with the latest and greatest thermal paste available to me then... white goo!
my old (well, i say old, i had it for about 2 weeks a few months ago) 2400 hit 2380 with 14X170 too, but it wasnt very stable, even with a TT Volcano 12.
so think yourself a bit luckier than some