forcifer

since your ram is very good at overclocking, this is what i would do (i had a chip very similar to this one, and it worked well :)):
1: in bios, drop the multiplier to around 10 (this will underclock the chip, but it will make overclocking much easier and you will be able to go higher)
2: slowly raise the FSB ~ 10 at a time. your goal will be 400, but you are going to need to up to volts to somewhere around 1.375. DO NOT SET YOUR VOLTAGE YET.
3: as you go up, run stress tests such as wprime or orthos to make sure it works. most people recommend around an hour each, but when i overclocked i found that about 10 minutes worked very well. each to their own i guess.
4: if you fail a benchmark, i.e. your computer crashes, do not worry. go into bios, put everything back to where it was, and raise the CPU volt the minimum amount possible.
5: keep doing that till you reach your desired goal :) (400 x 10 = 4.0 ghz, a pretty good overclock that is very easy to obtain)
6: do not go past 1.4 volts, however, and post here. there are other ways, but this is a very simple one.
7: you may also wish to "loosen" ram timing, but again, if anything abnormal happens just post here again