Need insight on budget gaming pc build

Plan on building a budget gaming pc. I believe I have everything correct, just on unsure on the ram. corsair vengence ddr3-1600, but the cpu (pentium G3258 25th anniversary edition) supports ddr3-1333. the mobo can over oc the ram, but is it able to underclock it as well?

thanks.

http://pcpartpicker.com/p/mQZYRB

If you bought higher frequency ram and the motherboard can't use this frequency it usually automatically falls back to the frequency it can use. It's a simple dropdown menu in the bios. 

thank you for your help on that :) I plan on upgrading my cpu down the road.