I have a friend who's having some confusion with installing the memory. There are 4 slots for memory, 2 vertical and 2 horizontal. Asus also includes what they call "C Rimms" with them which seem like terminators. How exactly should the dual channel memory be installed in this? Is each pair of memory slots (pointing in the same dir) a bank and I should put memory in them in pairs? What about the "C Rimms" are they neccessary?