After giving this set of HyperX Fury modules in white a good run, I found the overclocking margin available was more than sufficient to allow these modules to play in a much deeper pool when it comes to maximum memory speeds. At 2666MHz, using timings of 12-13-13-32, these module see an overclocking boost of 800MHz. Yes, 800MHz over the rated 1866MHz! That is some pretty serious overclocking for a set of modules priced at only $79 USD. However, the required timings to do so cause performance to drop off in benchmarks at the upper range, though the reduction in performance is not really felt in day-to-day tasks.