It's not the CPU settings that you need. It's the motherboard
settings that will determine the overclock.
This should be your first stop.
Core2 Overclocking Guide (generic guide)http://www.tomshardware.co.uk/forum/259899-11-core-overclocking-guide
Shadow's Gigabyte motherboard OC guide:http://www.tomshardware.co.uk/forum/page-245679_11_0.html
It's for an EP35-DS3L but all the Gigabyte Core2 BIOS's are similar.