Looking for some confirmation on this. I have an a7n8x-e deluxe motherboard with 2x 256 pc3200 corsair xms memory. I want to add memory. Can i add a 512 meg chip (gonna use the same brand/model) and keep the 2 256 meg chips and still utilize dual channel? the board has 3 slots (2 slots for channel A, 1 for channel B)