In my last PC I had a motherboard with support for triple channel memory so I had three sticks of 2GB RAM (CM3X2048-1600C7DHX). I'm building a new PC that does not have this feature (ASUS P8P67) and I bought one stick of Kingston HyperX Fury 8GB memory at 1866MHz. The old RAM is 1600MHz but I know you can have two different speeds but I just need to know if I could have two sticks of the old memory in dual channel and one stick of the old memory and the Fury in dual channel.