"DDR3 is fast becoming the new standard as all things computer change. Memory makers know that some standards don't have to be exceeded, but improved rather. Here is a good case and point. I have here a Crucial Ballistix Tracer DDR3 1333MHz 4GB Dual Channel Memory Kit. It's not, 1600 MHz, or 1800 MHz, but a solid supported 1333 MHz. What's so special about it? Check out the specs and I'll sum it up for you after."