2. Motherboard, the Abit 865G seems best, support dual DDR and has on-board video. About $80. Does the dual DDR function below 800MHz? The reason I ask:
Yes, the dual DDR will work fine below 800mhz.
3. CPU - The P4 1.8A(400MHz FSB) Northwood goes for about $100. It's can run all day at 2.4GHz. That's with a FSB of 533MHz, hence the prior question. OCing this way only the processor is OC'd, everything else is in spec.
I have one of these myself, and it's clocked up to 2.7ghz with a Panaflo L1A. Not bad at all.