Thinking about buying this board. Can anyone answer my questions:\r\n\r\nI have 6gb DDR3 (3x2). There are 4 DIMM slots. Will this config limit performance. Should I get another 2GB to populate all 4 slots?\r\nIf I choose to run 2 GPUs in SLI, will the x8, x8 limit performance or will I not notice?\r\n\r\nThanks,\r\nSi.