Hi! I´m about to buy a ga z87m dh3, I´ll use it with 2x4gb 1600mhz DDR3, I see from the specs these motherboards allow 1866mhz and higher only by overclocking, I would like to know if in future i use a 1866mhz or higher DDR3 on it, I will haver problems or I would have to buy extra system fans for that. I wonder why gigabyte motherboards only allow speeds higher than 1600mhz by overclock when cheaper motherboards from asrock for AMD chips allow higher speeds but without overclock. Anyone knows? Thanks