i am running 4x4gb hyperblue kingston 1600. and i am going to buy 2x8gb evga 2400 to replace 2 of my older ones before i eventualy buy all 4 of the evga 8gb. my mobo supports all of the speeds. not that big of a deal really because i have more than enough. but the ram i am using is just old and my new pc deserves better. just wondering if i should wait until i can afford it all if its just going to downclock the speed. my mobo does support both sppeds.