I'll reply my own post
Waturbo was too expensive so I bought the Infinity and I'm quite happy with it. It's about 20 C cooler than before with the AMD Stock cooler.
on load with vCore at 1.58v (my CPU can't reach 2.4Ghz with less voltage)
AMD Stock cooler : 58 C
Scythe Infinity : 38 C
Gained 20C with less than $40.
I recommend it.
Athlon 64x2 3800+ @2.4Ghz | DDR400 1Gb Hynix | Abit AN8 Ultra | Antec p180 1.1