Nordic Hardware reports a startup named Turbo Cooling is working on an affordable phase-change cooling solution for overclockers. The product will be named Ice Age and it should be available in Q1 2009 for $249. That's about the price of a high-end water cooling setup but the Ice Age should perform a lot better:
The cooler called Ice Age should hit the market in the first quarter and is in the final stage of the R&D phase. Preliminary testing with an Intel Pentium 4 3.2GHz (Prescott, hot hot hot) and the more recent Intel Core 2 Quad Q6600 (2.66GHz) have showed promise with sub-zero results, speaking Celsius of course, far up the frequency scaling curve. The Pentium processor managed to go to 4.8GHz at best, and with some more tweaking they are hoping to do 5GHz (not displayed in chart).
The Intel Core 2 Quad Q6600, with two more cores under the IHS, was pushed to 4GHz stable under 100% load. They have reached 4.1GHz since the creation of the chart. These are some respectable results considering their main goal is to make it affordable and attractive to the large crowd.
Here's a chart of the temperatures Turbo Cooling got on a Q6600, but unfortunately the data there's no raw data and all the temperatures in the chart are in degrees Fahrenheit. Anyway, it seems that with a Turbo Cooling Ice Age you can keep a Q6600 overclocked to 3.8GHz at around -4.4°C under full load.
The Turbo Cooling Ice Age phase-change cooling system will measure 17.8 x 28 x 30.5cm (7" x 11" x 12") and will weigh less than 11.3kg (25lbs). It should be easy to install and won't require any kind of drilling.
The Ice Age will be compatible with the Intel Pentium D/Extreme, Celeron D, Core 2 Duo/Quad/Extreme processors, and AMD socket AM2, 754, 939 and 940 processors.