We actually purchase DDR3-2000 memory and run it at DDR-1600 speeds, which we have found very effective in making the memory cool running and stable.

Enthusiast-level, high-speed memory is a premium upgrade for computers. It provides increased bandwidth and reduced latency, but those benefits don't always translate to real-world performance improvements. Some applications and games can be sensitive to it, though, and in such cases the added cost can provide a nice boost.