HotHardware overclocked the Intel Core i7
>> Intel Core i7 Overclocking - A HotHardware How-To
Intel's Core i7 processor offers a significant performance increase over previous generation Core 2 processors. In addition, like the legacy Core 2 architecture, the new Core i7 also has a bunch more headroom for wringing upside performance out of the chip, maximizing value, power and return on your investment with overclocking. In fact, Intel actually built-in a predefined overclocking feature called "Turbo Mode". We explain how not only Core i7 Turbo Mode works but also how to manually overclock the Core i7 in the BIOS as well as give you strategies on maintaining stability of the system as you ramp up the Core i7 core frequency for even larger gains in performance...
>> Intel Core i7 Overclocking - A HotHardware How-To