I'm torn between 12GB vs. 16GB. If I buy the 8x2GB its so much cheaper but does this mean that triple channel wont be used? I've read somewhere on these threads (an older thread from googling) that the if the first 3 RAM slots match (in this case 2GB dimms) then it should enable tripple channel + the rest 2 should be used as single. Is this true? If so then I should just get the 8x2GB configuration.