I am not familiar with the stock hsf fan for retail xp's I usualy get oem cpus.
All i can say is that from my experience with a stock hsf for my tbird 1.4, it was crap. It did not do a good job at all, as one of overclockers.com's many hsf tests concluded, the stock heatsink proved to be an outstanding paper weight.
I would recommend perhaps getting an oem cpu for cheaper and putting the money in and get a decent cooler, something that will do a better job, put you down into less risky temps, you can apply AS3 and not have to worry about picking off the thermal crud they put on the bottom. Plus I know with my sk6 it did way better job cooling my tbird and Im still using it on my 2200+ and its doing a good job.
IMO amd stock hsf is ok for running at stock, for ocing I would look into a better cooler.
Some to check out :
Thermalright Sk7, Sk6+, slk-800 is really nice but pricey, or even a Volcano 9 I think would do the job ( I dont know too much about thermaltakes like up performance wise ) Those are some decently priced ones although you can spend alot more to get something more powerfull like alpha 8045, swiftech mcx462 or as mentioned slk-800.
Note in Advance: if you decide to go with something like sk6 or sk7, if noise may be an issue, avoid delta fans, I really nice setup ive seen is the Sk7 with a 74mm YS Tech TMD fan (had motors in each corner instead of creating deadspace in the middle of the fan )
Hope this helps!
