1. NO DOT touch your FSB, keep it at 100, just increase multiplier and voltage.
2. You need to follow a process to find the best voltage for your specific chip. The best voltage varies from chip to chip, even if theya re the same model. For example my CPU is stable at 4.7GHz with 1.32v
3. There are a few things you need to do to get the process going. See below simplified process and link(the link is more for experienced OCers) http://www.thinkcomputers.org/intel-ivy-bridge-overclocking-guide/
OK there is a guide, its not really for beginners, so it boils down to...
1. Disable all power saving adn turbo boost features and pick a load calibration, 1 being very stiff and one voltage constantly, 2 being a little more relax(easier to achieve stability), i prefer level 2.
2. Set voltage to fixed at first and drop it to 0.9v. (easier than fixed)
3. Boot into windows and run prime 95 or similar stresstest to test for stability for atleast half an hour. This will give you an idea of how sensitive your specific CPU is to voltage change.
4. Increase your voltage to 1.2v and multiplyer to 4.2GHz. Test thoroughly for an hour. Keep a close eye on temps with real temp or HWmonitor.
To go above 4.2GHz.
Increase Multiplier one at a time testing for half an hour between each bump. When stability is lost, add 0.05v and try again.
Repeat process until you reach your desired OC or unacceptable temps(drop one clock and/or Voltage) and viola you have your OC...
Just follow the process and you can OC with ease.