Another change is that the 120mm model now has six instead of five heatpipes. Noctua promises 100% RAM compatibility in single fan mode and the 140mm version has an assymetrical layout for better PCIe compatibility.
Both models are expected to be released sometime in 2016.
After updating their 92mm coolers and 14cm dual-tower model last year, Noctua gave the first preview of future updates to the renowned NH-U12 and NH-U14 single tower series. The fins of the prototypes are deeper than those of the current NH-U12S and NH-U14S, resulting in a 50% increase in surface area on the 12cm model and 30% on the 14cm model. Combined with one extra heat pipe and the next-generation 120mm A-series fan, the 12cm unit rivals the performance of the current NH-U14S. The new 14cm version provides further increased performance and is designed to work with a new 140mm A-series fan that follows the same design approach as the new 120mm model. Noctua plans to introduce both coolers when the respective fans are available in 2016.