Yeah, not that pleased so far with Haswell, really bought it for the motherboard and its SATA III ports.
My i7 950 never broke 70C with the same tuniq tower. That was overclocked to 3.85Ghz, idled at like 32C, could barely hear it when it was running. It really doesn't make a lot of sense to have a 130W chip run so much cooler then a 84W chip.
I'm tempted to try a hand at delidding, but without a good water loop to go along with it, I don't think I'll get very far. Hopefully I can make it rock-stable and hold out for Broadwell, or at least wait on a new stepping for Haswell.
It is more the stability I am displeased with. It will run fine seemingly for hours and only crashes on stress tests when over 4.3Ghz, then it will crash under the same conditions it had been running. Not really sure it is the temperature that causes it or voltage droop, but I can't lower the voltage anymore without it crashing constantly. I mean we are talking fairly small gains over the stock turbo frequencies.
Messing with LLC and a few other settings to see if I can improve on it. Just not the most friendly chip I've had to work with.