i have an asrock board.. i originally set the timings as the sticker said 2.5-3-3-6 then found out one of the sticks is only rated for 2.5-4-4-8.. despite the sticker.. and then on top of that the ram is only rated 2.5-3-3-6 for single channel operation.. anyways it works better at the new timings but still crashes and has trouble running many games..