Noctua NH-D15 G2 HBC Dual Tower CPU Cooler > Brown

Next-generation performance For an entire decade, the original NH-D15 was widely regarded as the bestaer on the market. The G2 version continues this legacy by further improving the renowned quiet cooling performance of its iconic predecessor. Espits iconic predecessor’sally in challenging conditions with-D15 G2 can achieve up to several degrees lower temheat loadsand thereby offer a thermal headroom that enables higher turbo clock speeds. Optimised, asymmetrical fin-stacks The NH-D15 G2 has been painstakingly optimised to best utilise the superior airflow and pressure performance of the novel NF-A14x25r G2 PWM fans. Thanks to the fans’ improved P/Q performance, the fin-spacing could be reduced from 1.9mm to 1.6mm, which made it pofin spacingntegrate 26 extra fins and increase total finenabled the integration ofsame time, the widtincreased the front fin-stack has been cut by 5mm so that the loading is more balancedfin stackthe two fans. More performance, smaller size Thanks to the higher fin density made possible by the new NF-A14x25r G2 fans as well as the asymmetrical fin-stacks and a slightly smaller gap between the stacks, the G2 version combines improved performance with a slightly smaller size compared to the original NH-D15 (9mm less heatsink depth, same heatsink width, same total height including fans). 8 heatpipes for superior performance at higher heat-loads The NH-D15 G2 utilises eight instead of six heatpipes compared to the original NH-D15. The increased thermal capacity of the extra heatpipes is especially helpful at extreme heat-loads such as 250W and beyond, where the performance boost over the original NH-D15 is the biggest. Three variants for platform-specific optimisation Optimal contact quality between the heatsink and the CPU is vital for achieving the best possible cooling performance. Since current CPU platforms differ significantly in terms of contact surface flatness and hotspot location, the NH-D15 G2 is available in a regular all-round version with medium base convexity as well as specialised LBC (Low Base Convexity) and HBC (High Base Convexity) variants in order to ensure the best possible contact in different scenarios. Specialised HBC (High Base Convexity) version The High Base Convexity (HBC) version achieves optimal contact quality on CPUs that become strongly concave when the socket is closed due to the pressure of the ILM (Independent Loading Mechanism). As such, it is ideal for Intel LGA1700 processors if no washers or so-called contact frames are used to reduce ILM pressure or if the CPU has been permanently deformed in long-term use. For further details, see this FAQ. NM-ISW1 shim washers for reducing CPU deformation on LGA1700 Adding 1mm shim washers underneath the LGA1700 socket’s ILM (Independent Loading Mechanism) will lower the pressure that the ILM exerts onto the CPU and thereby reduce the deformation that occurs due to this pressure. With the CPU being deformed less, the contact between CPU and low or medium convexity heatsinks will improve, which can yield typical temperature improvements of around 2-3°C. CPUs that have been used with full ILM pressure for longer periods of time may also see slight improvements with high base convexity coolers. For further information, please see this article. Offset design for better PCIe clearance Like the NH-D15S, the NH-D15 G2 is offset towards the upper edge of the motherboard (when installed in standard orientation blowing towards the I/O panel) in order to increase clearance towards the PCIe slots. This enables it to clear the top PCIe x16 slot on most current motherboards (see motherboard compatibility list). High RAM compatibility in single fan mode Thanks to its recessed lower fins, the NH-D15 G2 provides at least 59mm clearance for tall memory heatsinks in single fan mode, making it compatible with most high-end RAM modules on the market. In dual fan mode, the NH-D15 G2 should be used with standard height RAM (up to 32mm, please refer to RAM compatibility list) Two NF-A14x25r G2 fans Noctua’s next-generation NF-A14x25r G2 fans set a new benchmark for performance-to-noise efficiency in round-frame 140mm fans. Their superb acoustics as well as their superior airflow and pressure characteristics are one of the cornerstones that enable the NH-D15 G2 to push beyond its legendary predecessor. Speed-offset for optimal acoustics When two fans operate in a push-pull configuration running at the exact same speed, their acoustic interaction can lead to undesirable harmonics phenomena such as intermittent vibrations or periodic humming. Therefore, the two NF-A14x25r G2 PWM fans used on the NH-D15 G2 are slightly offset in speed ( /- ~25rpm) in order to ensure optimal acoustics.