I also believe that the motivation for creating BTX
was a lot of ignorance by Intel's staff concerning
the real cause of all the "PressHot"-related overheating:
http://www.supremelaw.org/systems/heatsinks/warning.htm
After confirming the defects in Intel's stupid push-pins,
through empirical, scientific methods, we found this
$5 part that even allows Prescotts to overclock without
overheating:
http://www.sidewindercomputers.com/lgbowiscsp.html
Lastly, if you look at recent developments by Cooler Master
and their many imitators, standard ATX systems can be
very efficiently cooled with proper sizing and placement
of cooling fans e.g. in the top, left side and bottom panels.
The latest CM Storm Sniper comes to mind:
we have one and we love it.
I believe that simple things were also overlooked by
Intel's BTX creators e.g. the "stack effect" that results
when hot air rises.
Live and learn.
Nevertheless, I do believe that some of Intel's engineers
need to re-learn Occam's Razor: the simplest solution is
the best solution.
MRFS