MSI Big Bang XPower - X58 mothetboard - w/ official support

[Raja@ASUS]

I guess you can try fiddling with the voltage and see what it does for you, though I tend to veer away from overclocks that require a voltage hike to this rail.

The PI filter, usually consisting of a couple of capacitors and an inductor, helps filter out hf noise which clock circuits are especially sensitive to.