PCI-E frequency clock

The OC utility that came together with the GC has a limited overclockability. So i was wondering if add the frequency on the PCI-E bus would do any good?

The default clock rate of the PCI-E is 100mhz right?? So i should keep it at that frequency?

If i clear my CMOS, all BIOS updates would be gone?

After clearing CMOS, BIOS settings are default? Or do i need to set value like clock rates and other settings?

The motherboard i'm using is Abit K9 SLI.

Generally PCI-E clock speeds are of little help when overclocking.However,sometimes upping the frequency slightly will help with over all system stability.Playing with the PCI-E bus frequency should be left to the serious over clockers.Unless of course you can afford to burn out your system and replace it as needed.I personally have seen no benefit from changing the PCI-E frequency,so I decided to leave it at 100mhz.I had more luck when I changed voltages on my hypertransport bus and memory and cpu frequencies.Goodluck.

Dahak

AMD X2-4400+@2.6 TOLEDO
EVGA NF4 SLI MB
2X EVGA 7950GT KO IN SLI
4X 512MB CRUCIAL BALLISTIX DDR500
WD300GIG HD/SAMSUNG 250GIG HD
ACER 22IN WIDESCREEN LCD 1600X1200
THERMALTAKE TOUGHPOWER 850WATT PSU
COOLERMASTER MINI R120
3DMARK05 13,471

Somebody answer me please.

Thanks.