Not true at all. My I7-920 has no problem what so ever using ddr3 1600 to it's fullest potential. I can't see how a game is going to make a difference with system memory bandwidth. It does make a difference. For example, Folding@Home, while folding a -bigadv wu, the difference between 1066 and 1600 is like night and day, witth a difference in time per frames that will result in a higher point return.