I'd say let's start back at the begining instead of trying to start in the middle. Turn your multipliers down on your CPU, NB and HT and then increase the reference clock by 5MHz. Start at 205MHz and then go to 210MHz until it's unstable. Back it off the last stable point. What I mean by stable is your are running a stress test like OCCT or Prime95 or something like that on your system. We're trying to find the fastest your RAM will run at. Of course you can increase your voltage on the RAM and keep going till you are at say 1.7v or 1.8v. I don't know your RAM, but that's a good limit to start with for now. Now that we know what speeds and voltages your RAM can hit, we can move onto your CPU.
Leave the CPU multiplier at auto and disable turbo. Keep the other multipliers turned down and back off your RAM divisor to say 2.66 or 1066MHz. Now start doing the same thing that you did to your RAM, but this time you will be testing your CPU's limits. At stock, your CPU should use only 1.3 vCore to 1.35 vCore. I'd personally stop at 1.45 vCore. Now while finding the absolute limit of your CPU, you may have to add some voltage to the HT link because your reference clock will get pretty high. This is where those fancy unlocked CPUs are nice with the unlocked multiplier, but you can still do pretty good going this way.
Once you find the limit that it runs stable, you can turn down the CPU multiplier and RAM divisor and go onto your NB, and then onto your HT. testing it this way removes some fo the limitations when you OC your whole system. You'll know what voltages and what limits your chips and RAM will need to be at to achieve certain settings on your OC.
It's a long process, trust me, but it's worth it in the end to have a stable OC and have a greater understanding of your system if you do crash.
*This is just a quick and dirty explanation. There are overclocking guides around here with much more detail and thought process put into them.
Multi-Core Upgrade Guide
Do you want a world ranking? Join Team Fusion in Forum Warz 2011!