Whenever I OC to 220, I can have it run somewhat stable and leave all of the voltages at Auto settings. Once I begin to push past 230, I become unstable; sometimes radically. As I was toying with pushing up the voltages, I Google'd around and found this thread. Now, the images the one user submits shows him pushing the FSB to 300. My CPU-NB VDD was at 1.3875 and my CPU-NB Voltage was at 1.415. With what I was clocking my FSB at compared to this other person's, I should've been running perfectly fine (I'm guessing) and decided not to push my voltage any further. So now I'm under the assumption that I've got something else wrong and that's the cause of my instability, and have reset everything back to default values for now.
Should I be boosting the NB and/or HT Link voltages? It it something else I need to modify?
Note: I left the CPU multiplier at default (x16), had the RAM timings set at manufacture settings and at 2T, and had my RAM clocked under 1600 MHz (speed rating of RAM).
Your CPU-NB voltages should be fine, if anything a bit high for those kind of clocks, but that's fine. What kind of instability are you seeing when you pass 230 FSB? I'm thinking that you may need to adjust your CPU voltage or RAM voltage, although you say you have that underclocked. Another possibility is that your setup somehow doesn't agree with that particular combination of clocks, despite them not being too high. I have the same board, but I run an X4 965, and I can up my FSB to 240 and drop my CPU multiplier and then run stable without changing any voltages. This would also allow you to run your RAM at stock speed by dropping the multi to x3.33. I know I said this in my last response, so I guess it would be best to know how the instability manifests itself to figure out which component is giving you trouble.