What were the 360/91, 360/95, 360/195, 370/165, 370/168, 370/195, 3032 and 3033, chopped liver?
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Tony Harminc <t...@harminc.net> Sent: Monday, December 9, 2019 2:27 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Water-cooled 360s? On Mon, 9 Dec 2019 at 12:43, Allan Staller <allan.stal...@hcl.com> wrote: > IIRC, Water cooling did not appear until (at the earliest) the 308x > processors. > I am 99.9% positive there were no water cooled S360 or S370 processors. > Many will say you're wrong, but you do have at least a shred of an argument... >From something I posted here in 2010: The 360/85 and similar 370/165 and /168 had water circulating to all the CPU frames from a central power and coolant distributing unit. But the only directly water cooled semiconductors were in small distributed power supplies, where the power transistors' heat sinks had water channels through the block. The actual logic chips were mounted on conventional circuit boards, and each internal rack/stack of such vertically mounted boards had a finned heat exchanger like a small car radiator (should be called a "conductor", but it's too late to change car terminology) with fans blowing air through it and past the boards. With the 3081, IBM mounted multiple chips in a TCM (Thermal Conduction Module), and each chip had a helium surrounded piston (aluminum, iirc) pressing on it, and conducting heat into the surrounding aluminum block. Then each block had water channels hooked up to the central PCDU. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
