Switch GPU(integrated graphics) turbo ON or OFF

There is no turbo for igp, at least i don't think there is. If there was it would be in your bios.

on my P8Z68-V PRO/GEN3 there is a gpu turbo in the AI suite for the igp--in the turbo evo section

basically lets you overclock the igp

probably only usefull if you dont have a dedicated graphics card

can also do it in the bios

assuming you mean the latest generation i7 as the earlier ones--like i7-920 etc didnt have igp

all latest gen sandy bridge integrated gpus have turbo, even pentium.
look for a turbo boost setting in processor graphics/ integrated graphics/graphics setting in your motherboard's bios/uefi. set it to disabled/off.
i don't know why you need to turn of igp turbo boost off, it's not bad for the system. if you have a discreet gfx card or p67 motherboard, the igp is turned off. if you're using igp, turbo boost can actually enhance performance when there is a need.

oh that turbo lol now i found it in the bios >_<