Les,
Thanks for the data. Can you point me to the thread where this is discussed. I looked around the site. A lot of interesting stuff being discussed there.
I'm not following everything you wrote. I haven't been able to find a reference to "Waterloo calculations". Is the graphed data arrived at by running the processors at different frequencies to get different "radiate" Watts?
Having seen you mention it somewhere, I have been using 0.1C/W as a single pelt/die Rc. I had written a crude pelt calculator spreadsheet before I learned of the Kryotherm calculator. With it, I was able to match JoeC's test results for the Swifttech air cooled pelt fairly accurately using 0.1C/W for Rc, and 0.22C/W for Rh. (Compare to 0.26C/W for JoeC's die simulator measurement of the MCX462+ alone.)