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EEVblog #1341 - AMAZING $250,000 IBM Processor TEARDOWN!
About this video
Dave Jones of EEVblog tears down a 1991 IBM 9121 thermal conduction module from a System/390 mainframe, a 63-layer ceramic hybrid module with 2772 pins worth about $250,000, and demonstrates a BGA desoldering technique.
Why it appears in the archive
Cited in threads on chip packaging and cooling as a vivid look at vintage IBM mainframe module construction.
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From the Hacker News discussion
All the vintage mainframe stuff is pretty mind blowing. There is an awesome hidden gem on YouTube: CPU Galaxy. He has a huge collection of vintage CPUs. IBM 9121 Mainframe CPU [LINK] Dave from EEVBlog also made a video about it [VIDEO]
Read original comment ↗The thermal solution and packaging looks a lot like mainframe systems from the 80s (IBM, Siemens, Japanese). Siemens H100: [LINK] [LINK] IBM: [VIDEO]
Read original comment ↗This one does[1]. It have a bunch of pistons on springs touching each chiplet, all in mineral oil. Price bit out of range for typical desktop user tho * [VIDEO]
Read original comment ↗