With every new DDR memory release comes a decline in operating voltage and a decrease in heat output. In the transition from DDR2 to DDR3 and now DDR4, we?ve seen voltages drop and the need for large memory heatsinks are no longer necessary. This allows memory brands to release high-performance memory kits in compact low profile form factors that require minimal cooling. Crucial Ballistix Sport LT is a great example of this ? it boasts high frequency yet it still has a low profile design making it ideal for use in compact system builds and with large tower heatsinks that are definitely going to be necessary to cool some of Intel's swanky new Haswell-E Core i7 5XXX processors.