On Fri, 8 May 2009 15:37:26 +0100, Mike Tomlinson
wrote:

In article , Spehro Pefhany
writes

I guess that would be a rather serious problem if the temperature
inside your computer case averaged 105°C = 221°F.

Seen a modern mainboard recently?

Certainly.

Voltage regulation MOSFETs with
heatsinks on, some with their own extractor fans? Heat coupled to the
capacitors by a few millimetres of thick copper PCB trace for excellent
heat conduction?

Have you put a thermocouple on the capacitors?