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Vintage estate find. ESTIMATED TO HAVE OVER A 1/4 OUNCE OF PURE GOLD IN THIS BABY!!.
EARLY, IBM 3081 Mainframe CPU MCM (multi-chip module) vs. later models called TCMs (thermal control modules), MCP 41388312, P/N 4458974, with IBM 370 Mainframe Computer Chip with “heat sink”.
It is great cosmetic condition with pins and silicon dies protected by its metal frame (called a heat sink), as pictured. Please see photos

IBM Controller Card MCA 25H3016 11G16X9761-01 Chips F65535 VGA PS/2 Vintage
$156.80
59X7184 IBM GREY HH 5.25 FLOPPY Type 1711 Original Vintage Retro Computer Deskto
$195.00
IBM 02JE722 GEN2 PICKER ASSEMBLY ACCESSOR FOR 3555-L3A TS4300 TAPE LIBRARY
$2299.99
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Documentation