Well, I'm quite pleased with my P4S800 mobo!
The biggest problem is that maximum vcore is 1,6 V.
I've P4 2,4b processor overclocked to 3,2 Ghz and it's ALMOST stable.
Fsb/AGP settings are 177/35 and there's no problem in that area.
But, if I try 166/33 settings everything goes wrong. I can't even boot to Windows.
So I think there really isn't any PCI-AGP fix and the mobo only works stable when you use 133-155 or 175-200 FSB!
I recommend you invest 20-30 € (or $) more and buy a mobo that gives enough vcore (at least 1,75 V) and a
good PCI/AGP fix!