Welp, there went an hour of billable time... =D -- Anders Nelson +1 (517) 775-6129 www.erogear.com On Thu, Apr 1, 2021 at 12:56 AM D. Resor via cctalk <cctalk at classiccmp.org> wrote:

On 2021-04-03 11:11 a.m., Scott Quinn via cctalk wrote: BY CMOS POWER-2 are you referring to the processor used in the high end second generation RS/6000 systems?? If so then no, like the ES9000 module the chips are mounted on a ceramic substrate. But in RS/6000 processor the chips sat in a shallow well in the ceramic.? I seem to recall that the well is filled with oil and a metal lid bonded to the edges of the ceramic.? the metal lid was the surface the heat sink was fastened to with a layer of thermally conductive oil between.? I opened one up one time but I no linger know where it is. Paul.