As for the original Toxic cooler - blowers suck
And you, sir, should be done the same that you did to the poor AC S1, trying to fit it on 4770. All you had to do was to trim a dozen fins, cutting them off a little before the heatpipe that's closest to the I/O bracket. There was really no need to maul the poor cooler in such a ghastly way. But alas, tis too late.
For a while I also wanted to slap the AC S1 on my 5850 when the original fan simply broke down (bearings gone to hell), but I got, by some strange coincidence, a cooler from the 5830 version. I briefly hoped I would simply replace the fan, but the 5830 fan is larger than the one in 5850, so I had to transplant the whole HSF. Also, the 5830 cooler is bigger, too - 3 heatpises vs 2 heatpipes on 5850. Anyway, both fans idle at < 1100, which is quiet enough for me those days, and ramp up to at least 2000 when loaded. Temps are quite OK, with 40 C in idle and around 70 when gaming. I'm sure the S1 would be a much better solution but I'm quite happy with the system as it is. Just my 2 c click
- a link to a Polish forum with pics of 4770 and AC S1 - disregard the blah blah and enjoy the pix