Overclocking Help?

So, I got this hardware monitor and noticed that my bus speed is 200MHz, and I believe the multiplier is 20x, because the CPU is running at 4.0GHz in My Computer, but on hardware monitor, it's only 3.4GHz. But my main problem is deciding whether I should increase the FSB clock and lower the multiplier, or keep it how it is right now.

I got 1866MHz 8gb RAM, because I needed Sony Vegas to freeze a little bit less, and to preview the video smoother. But should the FSB match the RAM at 1866? Or am I good?

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