i was going to buy an ASRock Z68 Extreme7 Gen3, but it says it only supports dual channel memory? why are there 4 dim slots then? i was planning on pairing it up with about 16gbs of 2133 ram, but the only memory i can find to fit that is quad channel? would something bad happen if i just shoved lets say a 16gb quad channel kit of ripjaws into my mobo?