I have a laptop with 1x4gb and I baught a 1x2gb stick hoping to run dual channel to make my intergraded graphics a little faster but when I installed the ram I opened up cpu z and it said i was stll running single channel. I did see an improvement in games but not much. Basically my question is am I running in dual channel and I just dont know it? or do the ram sticks have to be of equal size in order for it to run dual channel?