Does anyone know why companies recommend a 350W or higher power supply for the Geforce4 Ti family?  
 
If you head over to this link:
<A HREF="http://firingsquad.gamers.com/guides/power_supply/" target="_new">http://firingsquad.gamers.com/guides/power_supply/</A>
it is a guide about picking the right power supply.  On the second page there is a table of estimates of the power consumption for common devices in a computer.  Looking at VGA it takes only about 4amps of its power from the +3.3V rail.  After adding up all the components and everything you only generally need about 10amps on the +3.3V rail of the power supply.  If you had a low power PSU (say 200W) and it has 20amps on the +3.3V rail isn't that more than enough already to support even the higher end video cards?