Getting a 2.8 octo delivered tomorrow. Have two 4gb kits for it (2x2gb each), and in a couple weeks I was going to order one more 4gb kit, for a total of 14 gigs, all slots filled including the stock 2 gigs. Is there a reason this is not a great configuration? Would one be better off using this 2x1, 6x2 setup, or would 6x2 perform better for some reason? I am getting conflicting info regarding the benefit of filling all slots vs having all fb-dimms be matched. I know in a perfect world I would just use 8x2 for 16 gb total, but my wife is not going to suffer me putting any more money into this box, so the two listed configs are my options, 14 (2x1, 6x2) or 12 (6x2) total. Appreciate your opinions.