After several tries (the cooler was taller than the slot for the mobo tray grr) I got the Infinity in, and damn. mobo from 40º/55º idle/load to 25º/33º. cpu from 45º/69º to 29º/46º! I am very impressed with this cooler. I did put a 92 CFM thermaltake fan on it so maybe that helps. Haha my computer now sounds like a jet engine with the fans turned up. I put in four adjustable fans instead of the slow ones that my Lian-Li case came with and it made a huge difference. I have close to 200 cubic feet of air moving thru the case every minute. But it's rather amazing now.
The cooler is nice, but very, very heavy at 960 grams. It seems nice and stable with the four post 775 mount, and it fits inside my midtower case. Like I mentioned before it's taller than my mobo tray, and as a result I had to take the whole thing apart and re-assemble it inside the case, which was a bit tough since I have a nice cast on my arm from an accident a few months ago, but I managed to get it together without too much difficulty. One problem though is that the fan retention springs scraped and dented the heatsink cover on the northbridge chip, but since I plan on removing the cover as soon as I get a stable overclock it doesn't really matter. There was also only one side of the cooler that I could easily mount the fan on, since on the other side towards the rear of the case the fan was sitting directly on top of the radiator for the heatpipe from the chipset. So I ended up having an 80mm fan as intake in the rear of the case blowing directly on the cooler with the 120mm fan on the other side of the cooler sucking air thru it instead of blowing air into it. After an hour of orthos the CPU was at 45ºC which means I have a good 15º to play with for OC'ing.
Oh and what's the highest temp the chip will take for a good period of time? I think I want to stay below 60º at load, but since the chip was getting up to 65º+ at stock with the intel cooler I am thinking maybe it can take a bit more.