Matt Mc_Carthy wrote in a message to Roy J. Tellason:

 MMC> Since the ATX PS's put out such heavy amps on the 3.3V line, and
 MMC> that line powers the CPU _and_ the RAM, I'd suspect the 3.3V is
 MMC> now the most regulated voltage. 

I dunno,  but I have a dead one here I can open up and look...    :-)



 MMC> The remaining voltages are just derived voltages, and probably
 MMC> aren't too important to load. 

Agreed.

 MMC> The (-12V) is always reverse-connected to the PS fan, so that 
 MMC> covers that one.

Oh?  I didn't know that's where they took that from.  Never traced it out...

 MMC> I don't believe anything has used the (-5V) line since the days 
 MMC> of the 16K RAM chips!   :-)

Yeah.  Do they still supply -5 on ATX supplies?  I haven't looked.

 MMC> I'm also finding a lot of handy uses for those 'Garden Light'
 MMC> bulbs as they are also 12V, same physical size as automotive side
 MMC> marker and trunk lights, and the packages are available marked in
 MMC> 4W, 7W and 12W sizes which takes out a lot of the guesswork and
 MMC> lookup tables (which I've no longer been able to find). 

Hmm.

I think I need to do some charting,  when I get the chance to mess around
with it,  to see what various bulbs do at _and below_ their ratings. 
Should be interesting.

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