"Smart" fans are often known for their setpoints being too high, causing reliability problems. The following takes it a step further.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=331So the fan doesn't even begin to work until above 60C, already a bit high for electrolytic caps. It won't go to full until 100C, which would definitely degrade the caps very quickly. Worst part is the hysteresis, which is exactly what you want to induce thermal cycling.
My "cheap" Jetway board had something similar, but it was easy enough to disable in the BIOS.
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