Noctua
Noctua NH-D15 G2 LBC computer cooling system Processor Air cooler 14
The NH-D15 G2 is the further improved second generation of Noctuas iconic NH-D15. With its state-of-the-art, speed-offset NF-A14x25r G2 PWM fans, eight heatpipes and asymmetrical fin-stacks that have been carefully fine-tuned to work in tandem with the new fans, it achieves even better quiet cooling performance than its award-winning predecessor. As such, the G2 version is a true flagship model that continues the legacy of the original NH-D15 by pushing the boundaries of air cooling and rivalling the efficiency of many all-in-one (AIO) water cooling solutions. Optimised for relatively flat CPUs, the specialised Low Base Convexity (LBC) version provides excellent contact quality on AMDs AM5 processors, even if the included offset mounting option isnt used. In addition to its further improved performance, the NH-D15 G2 also offers enhanced compatibility thanks to an offset construction that allows it to clear the top PCIe x16 slot on most current motherboards. Last but not least, the G2 version has been upgraded to the Torx®-based SecuFirm2+ multi-socket mounting system with included NM-SD1 screwdriver as well as to Noctuas superior NT-H2 thermal compound. In short, the NH-D15 G2 has been further refined in virtually all respects from the heatsink and the fans all the way down to the mounting, thermal paste and accessory package. Topped off with Noctuas trusted 6-year manufacturers warranty, its the new number one choice for customers who demand the best of the best in air cooling. Next-generation performance For an entire decade, the original NH-D15 was widely regarded as the best air cooler on the market. The G2 version continues this legacy by further improving the renowned quiet cooling performance of its iconic predecessor. Especially in challenging conditions with higher heat-loads, the NH-D15 G2 can achieve up to several degrees lower temperatures and 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 possible to integrate 23 extra fins and increase total fin surface area by 20%. At the same time, the width of the front fin-stack has been cut by 5mm so that the loading is more balanced between the 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 LBC (Low Base Convexity) version The Low Base Convexity (LBC) version achieves optimal contact quality on relatively flat CPUs. As such, it is ideal for AM5 even if the offset mounting isn't used or if users seek to combine the lowest possible CCD temperatures with the lowest possible IOD temperatures. The LBC version is also recommended for AM4, LGA2066 and LGA2011 (-3) (free-of-charge NM-i20xx mounting kit required), direct die applications as well as CPUs that have been lapped flat or outfitted with flat custom heat-spreaders. For further details, see this FAQ. NM-ISW1 shim washers for reducing CPU deformation on LGA1700 Adding 1mm shim washers underneath the LGA1700 sockets 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
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