OK, so the temps I was getting from the Thermaltake cooler are only about 4c better than the first gen Corsair H100 I was using on my Haswell 4770k.
So, I ordered in some Cool Laboratories liquid Ultra, and today I delidded my CPU. I removed all the thermal paste under the lid and shined up the die really nice.
I spread a tiny bit of the Ultra, reinstalled the lid and cpu on my mobo and used AS5 between the lid and the Thermaltake cooler.
Now I have seen a huge difference in temps. Running Prime 95 on the hottest test, I am now running a sweet 67c max on my top two cores, and 72c on my bottom two cores with an ambient of 23c. This is about 10c lower than my system was before delidding.
Running Intel Burn test:
Before delidding, IBT was peaking at 100c, while hanging out in the lower 90s. Now it's peaking at 83c on the top cores and 86c on the bottom cores, providing a 14-17c reduction in temps under what is close to a maximum load. This is at 4.5GHz, and a Vcore of 1.28V. As wel all know, IBT is not a real world test, but rather sort of a worst case scenario, so my average temps for gaming should be quire reasonable now (haven't done any gaming yet).
I am a very happy camper with the delidding.
I am amazed we haven't seen any other Thermaltake owners in this thread. That's too bad. It may not be the best cooler on the market but it's pretty good. I suppose most people just want a smaller cooler, and since you can get pretty much the same performance from the newer generation H100i and other coolers, I guess a 360mm cooler is a tough sell.
I purchased mine for two reasons. I wanted to try for better cooling on my Haswell, which at only about 3-4c difference is a bit of a bust, but I also specifically wanted a 360mm rad because I had modded my Corsair 600T case to fit one (sort of by accident, or rather as a by product of trying a push/pull install with the H100). Since I had this large 120mm hole under the top grill/cover, I decided I wanted a 360mm rad to cover it up. I must say, the fit turned out perfect.