I ran a Titan Fenrir (not the Evo) for a time with my q9650 - did very well but following a dropped case that resulted in one of the heatpies being slightly knocked in it was retired and replaced with a megahalems which is a better cooler .(should be at the price !).
But until the drop had been happy once I swapped the fan out - I found it too noisy for my ears
Overall a very good cooler at a very keen price.
I have not seen any reviews of the evo with a s775 cpu but would assume that it will be as good , if not better than , the original.