Archived from groups: alt.comp.periphs.videocards.nvidia (
More info?)
duralisis wrote:
> Dr. Linux wrote:
>
> > I'm using Nvidia's overclocking utility and I was wondering if
> > there was any advantage in increasing the AGP above my current
> > default of 66?
> >
> > Daniel
>
> It used to be that overclocking your FSB helped system wide
> performance (more bandwidth, more throughput). This isn't so true
> anymore. You indicate you're using NV's OC utility, which leads me
> to believe you have an NForce based board like myself.
>
> I know that with the NForce2, there's a FSB/AGP divider. They're no
> longer locked together. So we can have very high FSP speeds, while
> still having 66mhz AGP. On some NForce 3 Opteron boards, this was
> disabled in the first revisions and you could cook your PCI/AGP bus
> when overclocking!
Watch out.... because there are some boards that still don't have
seperate FSB and AGP/PCI ICs.
Namely SOYO, DFI, and FOXCONN budget boards.
In the past, AGP and PCI clocks were adjusted together. Every 2mhz
increments of the AGP clock would raise the PCI clock 1mhz.
The FSB divider would directly reflect the clock speed, ie 133Mhz FSB
with a 1/2 divider would equate to stock speeds of 66/33.
I haven't ever seen a significant performance yield to overclocking the
AGP/PCI clocks.
The most you'll get is 10FPS and 500 points in 3DMark... which isn't
worth the risk of permanently damaging the motherboard, pci cards, and
agp card.