The chip is approximately 21 cm x 21 cm (that's 8.5 inches). My kettle has 2 kW and doesn't take long to boil water from room temperature. I reckon you could f

The chip is approximately 21 cm x 21 cm (that's 8.5 inches). My kettle has 2 kW and doesn't take long to boil water from room temperature. I reckon you could fit four such kettles on the chip area (roughly). That means the chip would roughly boil water two times as fast as my kettle, were it used for that purpose. While that does pose reasonably interesting engineering challenges regarding coolant throughput etc., I don't think there's anything particularly difficult there. You probably would want a better heat transfer medium between chip and water than my kettle has (well, I have not disassembled it), but I agree with GP that a bunch of water pipes will work well enough as a cooling solution. Edit: Actually, screw it, we can calculate how much water we need to put through there. Warming water from 20 to 100 °C takes 334 kJ/kg. (That comes out to 167 seconds to heat 1l of water in a 2 kW kettle, for reference.) To remove 15 kW of heat with water cooling, assuming the water goes in at 20 and comes out at 100 °C, we need a throughput of 0.045 kg/s = 45 g/s = 45 ml/s. Sure, the temperature range may be a bit optimistic, but 45 ml/s (one liter every 22 seconds) is literally "just hold it under a running tap". The main engineering challenge would be making sure that heat is removed evenly enough, I guess.