Well anandtech already found that water cooling is simply insufficient to cool these for overclocking. You need an active thermal sink AKA a compressor cooler,

Well anandtech already found that water cooling is simply insufficient to cool these for overclocking. You need an active thermal sink AKA a compressor cooler, and then you're still limited by the TIM-gunk; heat-spreader at 25 °C, core at 100 °C. I suppose for the next generation Intel will announce that liquid nitrogen is basically required.