Whitehawk, a capacitor doesn't store current, but rather charge. This charge can be discharged and charged, providing current.
On a motherboard capacitors are primarily used for power filtering to remove excess ripple introduced and inherent to switching mode power supplies and caused by other devices switching on and off rapidly.
What I'm confused about is why Abit would have you remove a specific capacitor, because the only way a capacitor could cause what you seem to be describing is a flawed design or a capacitor accidentally being used in place of something else. The techincal term for what you seem to be describing is an oscillation. A capacitor in the wrong location or of the wrong value can cause a circuit to oscillate. (Unless you are purposely trying to make an oscillator this is a bad thing.) The reason I mentioned it is that I'm wondering just how effective removing this one capacitor is going to be and I'm wondering why it was there in the first place...
In case anyone actually cares:
A capacitor stores charge, measured in Coulombs (Q). (One Coulomb is equal to the charge of 1.6x10^19 electrons.) The capacitance of a capacitor is measured in Farads (C), which equals Charge (Coulombs) divided by the Voltage across the capacitor. In other words C = Q/V.
Probably more relavant to the problem at hand is the impedance of a capacitor (same as resistance - but impedance is the term used with non-DC circuits) which is proportional to frequency. Impedance (Z) (in ohms) = 1/(2*pi*frequency*capacitance*i) where capacitance is measured in farads. (i is there because a capacitor causes a phase shift.) This essentally means that the impedance of an ideal capacitor is higher for low frequency signals and infinite for DC. This allows a capacitor to be used to allow high frequency ripple to pass through the capacitor to ground, but not pass DC.
