Actually, the fluid referenced in the URL (Fluorinert) is used to cool some Crays. It is only manufactured by one maker, and only a few systems use it. There are actual liquid cooled Cray parts in the NSA museum near Ft Meade. Non-operational, of course, just like this post... James H. Smith II NNCDS NNCSE Systems Engineer The Presidio Corporation -----Original Message----- From: Charles Sprickman [mailto:spork@inch.com] Sent: Thursday, August 30, 2001 3:45 PM To: Alex Rubenstein Cc: Daniel Senie; nanog@merit.edu Subject: Re: What is the limit? (was RE: multi-homing fixes) On Wed, 29 Aug 2001, Alex Rubenstein wrote:

I recall something about liquid (something, could be nitrogen, or perhaps even mercury) that was chilled; PC Boards were then submersed in the liquid to keep cool.

Maybe on Crays?

Maybe in someone's garage? :) http://www.octools.com/articles/submersion/submersion12.html C

-- Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben -- -- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --