MAXIMUMPC JUNE 2004
ELECTRO MAGNETIC INTER-
FERENCE (EMI) FILTER:
Found in high-end power supply
units, EMI circuitry smoothes
out the small fluctuations in the
incoming AC current.INPUT CAPACITOR: Usually
the largest capacitor in a PSU, this
provides reserve power when input
power suddenly plummets (like, for
example, when someone fires up the
blow-dryer). In general, the bigger the
capacitor, the better.FAN: Heatsinks alone
are not enough. The
fan sucks air from the
PC case and exhausts
it out the back to
prevent your power
supply from becoming
an EZ Bake oven.LINE-CONDITIONING CIRCUITRY:
This is another of the phalanx of compo-
nents within your power supply that help
maintain consistent power levels from noto-
riously unreliable home sockets. Generally
found only in top-tier power supplies.