Well I got an actic-cool one because I thought it would be better then the stock one, but looking at them, im not so sure:
Fan Size 90mm
Compatibility Athlon 64 up to 4000+, Athlon FX up to FX-59, Opteron
Air Flow 42cfm
Power Connector 4 Pin
LED Light No
Heatsink Material Aluminum
Fan Dimensions 87 x 87 x 33 mm
Heatsink Dimensions 92 x 92 x 42 mm
Stock AMD one:
You cant see it as good, but this heatsink looks more elaborate. it has copper tubes going in and out of it and there are more metal panels. The fan definatly is not as big and I would assume not as powerful.
here is another pic of the AMD stock one. Im pretty sure that it is the one on the left:
so, which one should I use? and either way, should I use the thermal paste that came with the acrtic cooling one?