It won't break but you won't get a stable overclock. The VRM's on that motherboard overheat when running 125w CPU's at stock speed, this causes the motherboard to throttle down the cpu speed. Overclocking makes this worse, you will end up with performance issues with any attempt to overclock a 125w cpu on that motherboard.
The other point is going from 6 to 8 core will make no difference in CS GO as the game cannot use more than 4.
I am just trying to help you so you don't waste money on something that isnt going to give you the gains in performance you want.