I don't, it's just clear there are people here intent on creating fear, uncertainty and doubt for their own gain.
I couldn't care less what people buy as long as they research it themselves and can afford not to go into debt over it.
The guys working on this are a knowledgeable, fun and competitive bunch. I hope once they have something worth showing they'll make an effort to demonstrate it so you can see the team.
Not trying to create FUD, just stating the complete opposite of your opinion. I think when promising to deliver something intended for a data center, having external power supplies is both a shortsighted and moronic decision.
Back in the day Cray used to use liquid nitrogen cooling for the X/YMP or whatever it was called. I have no idea what they do these days.
All YMP and XMP's were air cooled. The YMP was the first to be offered without a water cooling option. To the best of my knowledge no Cray system used LN2 for cooling. Most of their liquid cooled systems used Flourinert. Prior works of Seymour Cray at Control Data were LN2 cooled.
You're right. Apparently it was actually a liquid called Fluoinert, and it was the Cray-2 I was thinking about.
From
http://en.wikipedia.org/wiki/Computer_cooling :
The Cray-1 supercomputer designed in 1976 had a distinctive cooling system. The machine was only 77 inches (2,000 mm) in height and 56 1⁄2 inches (1,440 mm) in diameter, and consumed up to 115 kilowatts; this is comparable to the average power consumption of a few dozen Western homes. The integrated circuits used in the machine were the fastest available at the time, using emitter-coupled logic; however, the speed was accompanied by high power consumption compared to later CMOS devices.
Heat removal was critical. Liquid Freon was circulated through piping embedded in vertical cooling bars in twelve columnar sections of the machine. Each of the 1662 printed circuit modules of the machine had a copper core and was clamped to the cooling bar. The system was designed to maintain the cases of integrated circuits at no more than 54 °C (129 °F), with Freon coolant circulating at 21 °C (70 °F). Final heat rejection was through a Freon to water heat exchanger.[4] Piping, heat exchangers, and pumps for the cooling system were arranged in an upholstered bench seat around the outside of the base of the computer. About 20 per cent of the machine's weight in operation was coolant.
In later Cray-2, with its more densely packed modules, Seymour Cray had trouble effectively cooling the machine using the metal conduction technique with Freon gas so he switched to 'Liquid Immersion' cooling. This method involved filling the chassis of the Cray-2 with a liquid called Fluorinert. Fluorinert, as its name implies, is an inert liquid that does not interfere with the operation of electronic components. As the components came to operating temperature, the heat would dissipate into the Fluorinert, which was pumped out of the machine to a chilled water heat exchange system.[5]