Re: DC fans versus AC fans (System Saver IIGS)

[mathias <mathi@topmail.de>]

hi supertimer,

i tried this, too, i just reversed my internal fan to suck air out of
the poewersupply, but actually i don�t thnik this changes temperature in
any ways, well i�ll get me a thermometer and check if you�re right

regards mathias

Supertimer wrote:
> 
> Here's another interesting modification.  It seems a single
> System Saver IIGS fan did not adequately cool my backup
> IIGS, which has quite a few heat generating cards inside.
> So I installed a small 12v DC fan on the internal power
> supply of the IIGS too.  This helped a little, but there were
> still hot spots inside.
> 
> Then I did something on a hunch: I reversed the air flow on
> the two fans.  Instead of pushing air out of the IIGS, the
> System Saver fan now pushes air INTO the top of the IIGS.
> Similarly, the internal fan now draws air out of the power
> supply and pushes it at the peripheral cards.
> 
> Guess what?  The hot spots are gone!  Also, I feel a cool
> stream of air coming out of the bottom of the IIGS.  I
> know it is counter-intuitive since warm air rises, but my
> IIGS really is cooler this way.
> 
> I'm used to having a cool IIGS since my flagship unit is in
> a tower case and reversing the fans on my backup unit
> reduces the temperature to the level I'm confortable with.