Harvard Thermal TAS (Thermal Analysis System) which I have, sells an add-on unit PC Trace - which I do not have
this permits a very accurate thermal modeling of the board in terms of heat inputs and dissipation
Since87 – it models with resistors so can also predict boardwide voltages, interesting stuff
I do not doubt that mobo mfgrs use this (in fact I know of several)
this 'variable' is why even a grothmeter will still fail to accurately characterize the heat load actually imparted to the cooling solution
all we can do is empirically hack away at it; and, as pHaestus and Les are doing, try to identify the source of anomalous results
. . . . and Watts are worse
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