Does turbo boost harms processor or motherboard

these pages might be of some help on turbo boost.
http://en.wikipedia.org/wiki/Turbo_Boost
http://www.intel.com/support/processors/sb/CS-029908.ht...
turbo boost shouldn't damage a cpu because it operates within the cpu's limits as long as the cpu is running at stock speed and is not overclocked.
leaving turbo boost enabled after overclocking the cpu over it's limits is not recommended. because the cpu would try to oc itself beyond it's already overclocked frequency and would very likely crash.
what do you mean by 'quit overclocking'?

thanks for ur reply. i want to shutoff the overclocking of my asus p8z68-v-pro motherboard and want to bring it to normal settings normal multiplier normal voltage normal frequency every thing my motherboard was overclocked by my friend and he is off the town these days . so how can i do it . anxiously waiting for ur reply !!!!!  

thanks for ur reply. i want to shutoff the overclocking of my asus p8z68-v-pro motherboard and want to bring it to normal settings normal multiplier normal voltage normal frequency every thing my motherboard was overclocked by my friend and he is off the town these days . so how can i do it . anxiously waiting for ur reply !!!!!

thanks for ur reply. i want to shutoff the overclocking of my asus p8z68-v-pro motherboard and want to bring it to normal settings normal multiplier normal voltage normal frequency every thing my motherboard was overclocked by my friend and he is off the town these days . so how can i do it . anxiously waiting for ur reply !!!!!

Get an aftermarket heatsink, if you get an i5-2500k and don't overclock it, its kind of a waste.

Well if your friend have a stable OC on your computer, then just leave it as it is.