I am planning on upgrading my PC's graphics card, PSU, and ram. I have 6gbs of ram right now(1x4 and 1x2). I am planning on ordering 2x4gb pack. Should I just run 8gbs or should I run 12gbs in flex mode (8gb dual channel and 4gb single/ 3x4gbs ). Is there any drawback from flex mode other then the ram sticks possibly not working together. Also would me running it in flex show any improvements over the 8gbs. I mostly game, but I dabble in video editing, streaming, and recording.