Chargeing

Hi Guys, I have GA-Z68X-UD3H-B3 and currently have 8 GB(2X 4 GB) corsair vengence 1600 on my system. I got Kingston Fury 16Gb (2x 8 GB) 1866 for cheap and was looking to upgrade the ram. But when I insert them I just get beeps like no RAM is present. If I Put back my old ones it boots fine. I...