CLASSICCMP digest 308

From: William Donzelli <>
Date: Wed Jan 28 19:56:23 1998

> I wonder what a more recent
> water-cooled machine (e.g. 3090) weighs, the TCU's (thermal conduction
> units) can't be very light.

The actual TCMs are pretty light - only maybe a pound or two a piece (they
are just aluminum, ceramic, and helium (!). The backplanes are heavy,
especially with the cold plates in the equation. In total, however, the
older processors (3081, for example), are mostly air inside. A fully
decked out 3081 CPU only has twenty or so of the modules. Most of the
weight is the frame and sheet metal.

The DASDs (disks), on the other hand, are very heavy.

William Donzelli
Received on Wed Jan 28 1998 - 19:56:23 GMT

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