In my computer, I have 3x 2gb DDR3 Tri-channel RAM. I would like to put 3 more 2gb sticks in the available slots in my mobo. Now, I know that the RAM has to be the same MHz, but I have heard that the RAM has to be from the same lot. Now, this information is 5 or so years old, so I am wondering if it still holds truth, or if I can just purchase which ever brand I want.