Rare IBM 3090 TCM -Thermal Conduction Module (Mainframe,Microprocessor For Sale

Rare IBM 3090 TCM -Thermal Conduction Module (Mainframe,Microprocessor
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Rare IBM 3090 TCM -Thermal Conduction Module (Mainframe,Microprocessor:
$400.00

About this Listing:
This listing is for a rare IBM 3090 TCM (Thermal Conduction Module). The IBM 3090 Processor was a water-cooled mainframe.Introduced in 1985, the 3090 contained four central processors and 128 megabytes of central storage. It was a follow-on to the IBM 3081 series that introduced TCM technology. This was the first processor to implement an ECL bipolar circuit TCM, very fast, but very hot.
Six inches square, and 3.5 pounds, the 3090 TCM had room for up to 132 chips, each with 612 ECL circuits. Each ceramic block of the material had 20 to 22 differently wired layers. More than 470,000 holes provided paths for the vertical wiring for layer-to-layer communication. The chips were joined to the substrate through a total of nearly 18,000 contact points, using IBM's unique chip-joining technology. All that circuitry generated 525 watts of heat -- enough to destroy the chips. But the heat was drawn off through spring-loaded aluminum pistons (seen in the cutaway section) that pressed gently against each chip. In turn, the pistons were housed in a "hat" filled with helium, an excellent heat conductor. Chilled water flowing through a conduit attached to the hat whisked the heat away. One TCM alone -- there were about nine in a 3090 computer -- packed as much computing punch as a medium-size System/370 of only a decade before.In the 1980's these TCMs would had a value of about $250-350K each. Most TCMs have beendestroyedfor their gold. Checkout the cutaway above that shows the inside of an IBM TCM with logic chips and copper pistons (this is for information only, this TCM is fully intact).
This was theindustry'smost advanced chip module. It is a must have for processor collectors!I combine shipping for multiple purchases (the best way to handle the combined shipping with your purchases is to add your items to your shopping cart, and then checkout)

To Learn More:

Click here to learn more about computer chip collecting at www.AntiqueTech.com.

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