Generation 2, 3 and 4 power supply cards are just as bad due to the cards being vertical and acid leaking sideways. C6 is a snap in super capacitor.
C12 (bottom left) will make a whining noise when the computer is off with the power standby mode near the relay K1. This is how you know it's about to die. C57 (Center right near very large white resistor) will also leak extremely badly.