Overclocking the P4 1.8A

[SafeZone]

I recently overclocked my p4 northwood 1.8Aghz to 2.2ghz (125mhz fsb) with the same setup as listed below with no problem, but I had an SB Live! PCI sound card. I had to give that card back to my friend, and when I switched to onboard audio, AC97 chip, the sound no longer worked. When I decreased the clock spead back to default (1.8/100) the sound worked again. Is this normal? Should I just buy a PCI sound card so I can overclock or is there a way to work around this ? Also, would I yield any higher OC'ing if I were to put PC1066 RDRAM in this board, the board supports it, but i currently have pc800 rdram in it...
thanks

 

[Detselom]

weird, dont know much about your sound problem. RDRAM is sensitive to fsb, so you wouldnt yield any more overlock if you got pc1066.