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 Published On Oct 5, 2020

Teardown of a $250,000 1991 vintage IBM 9121 TCM Processor module from a System/390 ES9000 Enterprise Server mainframe computer,.
Amazing state of the art 63 layer ceramic hybrid module construction with 2772 pins!
Part 2 X-RAY!    • EEVblog #1358 - $250,000 IBM Processo...  
And Dave demonstrates an amazing BGA desoldering technique that can only be done on these ceramic hybrid PCB's.
TCM PDF: https://eevblog.com/files/ibm-system3...
Another teardown with an amazing cutaway view!    • IBM 9121 Mainframe CPU Teardown, TCM ...  

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