Although this may seem like a fairly straightforward question, this will be difficult to answer.
I am an AMD guy, and I really can't be too much help with your i7, but the reason I decided to say anything about this is the way you ask this question.
Some general information can and probably will be given, but a lot of the ability lies in the PSU, the type of cooling you'll use, the motherboard's max H/T link speed, all kinds of things. The best thing to do, if you haven't already, is read up online about others having already done this.
I'm sure someone will be more than happy to walk you through, but having a good understanding of what is happening when someone tells you to change something can really help you goet the most out of your OC.
There are a lot of folks in these forums that are very helpful, and will chip in any kind of experiences they've had.
I really dig what intel did with these i7s and hope you get the best of it! Do yourself a favor, though. Read as much as you can stand, because it really does help to have a solid understanding of how OCing works.
Hope this has been some kind of help...
Asus Crosshair V Formula-Z, NB & FSB @2608 MHz
AMD 8350 @ 5.02 GHz 1.524V (200.6 x 25)
16GB GSkill Trident @ 2133 MHz C10
Asus 7870 2 GB 1200core/5500mem
Samsung 250GB SSD
Cooler Master HAF 932
Windows 7 x64
VRS Superbug/TacPack, Iris A-10A, PMDG 77W, 744 and MD-11
REX texture direct, FTX Global