I have an i7 920 so I cant help more. Run it as is fore a wile to day to day stabilty. Fore use other than gaming or benching you can lower fan speeds if you want. I would use it at those clocks fore a wile and see if you like the preformance. As you overclocke further the games will begin to maintain stabillilty.
Post a Bios template and let the games begin if you want.

EDIT:
This post on EVga forums may give you a starting piont but each board and chip i7 870 so to speek requiers the use of differnt settings to get the best result.
i7-860 and 4 RAM slots OC'ing WOOT STABLE
Look fore a forum post on your board and chip like this one to get information on your board.
Each time you change BIOS the game start all over