Wow, 550W power supply in a 1U case! I think the other 1U I posted only had 350W.
On the cooling: It's not really passive. If you look at the specs, they have 4 "radial" (centrifigal?) blowers in the case. I suspect that the case is designed such the the CPU (& northbridge?) heat sinks go all the way to the top cover, and the airflow is routed through them. That's the way it looks <A HREF="http://www.mutmut.com/dev/appro/1124/1124_1UBrochure.pdf" target="_new">here</A>.
Actaully, I wonder if this system might work better then a 2U horizontal case with more typical HSF? Sound's strange, but it may be easier to cool these systems in a 1U case!?
Thanks for the link.
<i>Cognite Tute</i>
(Think for Yourself)<P ID="edit"><FONT SIZE=-1><EM>Edited by ergeorge on 06/10/01 11:02 AM.</EM></FONT></P>