Dual Tower Design
The Noctua NH-D15 CPU Cooler uses a dual tower design to maximize the cooling opportunities. Thus using 6 heatpipes which go through the two towers, providing a better heat distribution. As well as providing more surface area which allows for more airflow with a dual fan setup.
The NH-D15 is supplied with premium 140mm fans which allow for their fan speeds to be controlled by the motherboard. Allowing them to be reduced from their 1500rpm standard to 1200rpm and gives you the ability to go even higher as well. The Nf-A15 fans are considered one of the best in the market right now.
High Ram Compatability
The NH-D15 provides 64mm of clearance over the tall memory modules in single fan mode. Thus making it compatible with most high end RAM. In dual fan mode it supports up to the standard 32mm height ram modules.
With the included thermal paste you can lower the tempretures even more. Thus the NT-H1 can provide you more than just a one time use. As well as lowering the thermal resistance, having excellent ease of use and incredible reliability.