21 Oct
2005
21 Oct
'05
1:34 p.m.
On 10/21/2005 at 1:24 PM Mark Tapley wrote:
Problem is the designers actually did do _some_
thinking. On
its way out the fan in the original configuration, the air went over
the logic board(s) first, then the power supply and drives last.
Reverse the fan, it's now hot air hitting the logic board. On my
system, this caused the SCSI controller to fail occasionally.
I think the older HP Vectras were a good example of how to use a fan--use a
big slow fan separate from the power supply with ducting (I'm sitting in
front of such a system now--a 1GHz P3). The result is a machine so quiet
that you're not aware that it's powered on. OTOH, the original IBM PC had
a very loud AC powered fan that left no doubts--and most other
manufacturers have followed suit, even with DC fans and those stupidly
junky heat-sink mounted fans.
I really miss the pre-Compaq HP.
Cheers,
Chuck