refer to this picture , the processor only touch 0.5+1+1+0.5 (left to right ) surface of hsf , total up 3 only . why the temperature decrease 1-3c ? is it because of bigger dimension , especially extra more 10mm width . refer to the diagram , the fan is not powerful enought , max rpm only 1500 plus extra silent than valina s1283 ..
overall i can say is a good hsf ....