The heatsink/fan units bundled with AMD Athlon processors historically haven't been too crash hot as far as performance is concerned, let alone noise output. Looking to rectify this issue and in turn become more competitive with Intel's stock HSF unit, AMD has announced the following changes to its box coolers:
-Quieter fan with 2 ball bearing design. The noise level is claimed to be lower than 34dBA. For your reference - Thermaltake Volcano 7+ in "Medium" mode makes about 35dBA of noise;
-Improved heatsink with higher content of copper and high efficiency phase changing material;
-More secure 6-tab retaining clip, instead of 2-tab at the present time.
X-bit Labs has the scoop .