heya sorry for making a new threat i tried to read previous posts but around after an hour or so i didnt find 100% my answer. so what i want to ask is I am allready using on dual channel setup 2x Kingston's KVR400X64C25 512MB pc300 400mhz. Now i found 2 pieces of Kingston KVR400X64C3A 512MB PC3200 400mhz on really cheap price. if i purchace them and use them on my 2 free Dual Channel Slots on my mobo they will work fine right? i mean they wont mess the dual channel on my 25's and they will all work toggether on dual channel mode x2 ?