I know that this thread is a bit old now but if anyone is looking for a great aftermarket HSF for their AMD cpu I can't recommend the Sunbeam Core Contact Freezer enough. I just installed mine a couple days ago and the difference between it and the stock unit is remarkable. I have 2 comps in a small, poorly ventilated room that is hot in the summer and warm in the winter..........not ideal conditions for air cooling but I have no choice. With the stock HSF my 955 BE (stock frequency) was idling between 38-44°C and at full load was 50-56°C.........far too hot for my tastes. Immediately after installing the CCF idle temps dropped to 30-34°C and the highest I have seen at full load is 48.5°C and that was during a very warm afternoon yesterday. I couldn't be more pleased with the results.
On a side note, there seems to be a lot of negative reviews on Newegg about the install process. I even read one "professional" review online that said it was impossible to mount this cooler on AM2+/AM3 sockets. That is complete misinformation. I bought this cooler specifically because it does not require the removal of the motherboard and seemed to cool very well. I found the installation to be extremely user friendly and I have no idea why so many of these people are having issues unless they have a very small case. Some also complain of the fan being noisy. I can't even hear the thing at low setting and it's barely audible at it's highest so again, take all of that with a grain of salt. It does cover a couple of DIMM's on my MB but with the fan removed they are completely accessible, that process is also very easy. I think for the money spent you just can't beat the CCF and the fact that it will install with the factory mounting hardware makes it that much more appealing.
My specs are above but I'll list the main ones regarding install:
AMD 955 BE
Gigabyte MA770T-UD3P
4x2GB A-DATA DDR3 RAM (2 w/heatspreaders, 2 without)
Azza Orion 201 case