my PC was going unstable sometimes because of the CPU temperature, so I just delided my 6700K this weekend, OC @4,5Ghz for 1.255v. It was throttling up to 90°C for a few millisecond and had an average 75°C in game
now without touching any settings it's around 45°C iddle and 55°C in game.
I used liquidmetal on the die and gelid between the CPU and cooler (Lepa AquaChanger 240)
I'm very glad. Anyway, I'm quite impressed by the temps you've got, nice cooling !