I had 8gb of hyperx-fury 1600mhz ram and decided to add another 8gb to double up but can i mix them? i have some Ballistix ram 2 x 4gb set of ddr3 1600mhz but the timings are different compared to the hyperx stick, will this cause problems? or will i be okay? Also if it will be okay which slots should i stick the ram in?