Now if you choose to overclock these modules, then there is enough headroom to get you over 2000MHz and allow you to use a bclock of up to 200MHz on your Core i7 X58-based system without fear of the memory limiting your overclock. This you can do without a bump in timings, that's 200MHz or about a 12% increase on top of the 1800MHz with really only a bump in memory controller voltage to reach 2000MHz. Over that and you have to start playing with sub timings and more voltages but that's what overclocking is all about anyhow.