[QUOTE=jasong;238831]Just an opinion, but that sort of thing would require some rather exotic cooling. It might even be too hot for helium cooling.

Anyone know how to calculate this sort of thing?[/QUOTE]Why should it need to run especially hot? As the old saying goes: size doesn't matter, it;s what you do with it that is important. In particular, lowering the clock speed is a good way to reduce the heat output.

The answer to your second question is: yes, they do. Just not me, unfortunately, without an investment in time which I'm presently unwilling to make.

[QUOTE=jasong;238831]Just an opinion, but that sort of thing would require some rather exotic cooling.[/QUOTE]

At last, a video that I saw about a decade ago and which was thereafter hard to find is back on youtube.

Have a look at [url]http://www.youtube.com/watch?v=Tl_RB5Snhr4[/url] for some properly exotic cooling.