so i have a 1600 4gb patriot extreme chip, and without looking, i bought the exact same chip only at 1333, can I pair them in dual channel mode? i have them side by side and i show 8gb, if i try and pair them what can i expect? can i overclock one or underclock the other to make them perform better? I will eventually get another 1600 chip, but right now isn't be the best time to do so, what can i do?