hey guys, sorry to ask such a basic question but i couldn't get a straight answer anywhere.. I have a dual channel ram motherboard i am running 2 x 512 ddr 3200 at the moment. I want to expand that to 2 more 512 to fill all four slots. Do i have to get the exact same brand of ram i have in 1st and 2nd slots for the 3rd and 4th slots to be dual channel or will any ddr 3200 512 ram work that are the exact same as each other?? Thanks in advamce for a non confusing straight forward answer!!!