Originally Posted by Clunk 
It is impossible to say what is reasonable to expect from your particular cpu at a certain voltage because they are all different.
Dont worry about the memory bandwidth for now. That is in the more advanced parts of the guide. Have a read of the first part of the guide that is based on the P5B, it should fill in any gaps, as the P5K guide assumes that you have read the first part
Dont be scared of adding voltage to the NB, I have been running this at full whack since day one, and the same for the P5B's before it. All you need to do, is make sure that there is some airflow through the case, and youll be fine.
Same with the CPU voltage, dont be scared of adding it in small notches, just keep an eye on the temps.
So, in a nutshell, dont worry about too many things at once while you are learning, and see how high your cpu will go at temps that are acceptable for your cooling, and once you settle on an overclock that is good for you, THEN you can go and mess around with the RAM and timings/speeds
I am convinced I have a bad chip/mobo, it's probaly the chip, as this is the 2nd mobo, I RMA'ed the 1st one after some posting issues. My RAM seems fine, I ram memtest with the stock settings, for a couple hours without errors. This entire week I have been tinkering with higher FSB's > 333. I have spent a lot of time trying to get stable at 3.2Ghz (400x8). I upped to the VCore to 1.45, NB to 1.55, Orthos fails within 2 mins. Unless there are some other setting on the P5k Vanilla version that need to be changed I am not sure what else to do at this point. I even loosed the RAM timings to 5-5-5-15 @ various voltages, still no stability. Seems like the best I can do is 3.0 (333x9) with most of the settings in this guide. Oh well 3.0 is 25% more performance for nothing so I'll take it. Sucks though, this board and e6600 should be able to do 3.6Ghz (400xx9). In any case my 8800 320M will be a bottleneck long before my chip is. If there are any other suggestions other than RMA'ing my CPU (I do not want to be down for weeks) I'll take the 3.0 and leave it alone.