Not necessarily. I've seen some cap ayam PSUs that have 18A on it rails..

Let's compare..

Cap ayam: PowerLogic Magnum "450W"
+3.3V = 15A
+5V = 22A
+12V = 12A

True wattage: Enlight 420W (High Power OEM)
+3.3V = 30A
+5V = 40A
+12V = 18A

You can see the huge differences on every rail between the so-called "450W" and a real 420W PSU.

That Enlight PSU is pretty old, since the very early Pentium4 days.. Nowadays, due to change in board designs and power requirements most PSUs comes with bigger +12V rails. If you noticed the newer AcBel 470W above, it comes with dual +12V rails of 18A each. Some new "true power" PSUs have single +12V rails of 30A and sometimes up to 50A (and even much higher!).

Cap ayam with 18A on the +12V rail: E-View "480W"

However notice all the other rails are weaker than the Enlight 420W? So how can this be a "480W" PSU?

True wattage: Corsair VX 450W (single +12V rail)

Now do you notice the differences with the so-called "480W"/"450W" and this real 450W PSU?

There's also the "weight factor". Most "true power" PSUs are much heavier than their cap ayam counterparts. Different (and more) components inside..

This post has been edited by lex: Today, 12:10 AM