In addition to the thermosiphon liquid cooler project, Noctua also brought several upcoming air CPU coolers and fans to the Computex 2024 show, including the new NH-D15 G2, the NF-A14x25 G2, as well as next-generation dual-tower 120 mm CPU cooler and next-generation 120 mm fan.

The new NH-D15 G2 is the upgraded version of the popular NH-D15, which now gets a new fin stacks with reduced fin pitch, leaving it with 20 percent more surface area, 8 heatpipes (instead of 6 on the NH-D15), new fans with both higher performance and acoustic optimization, and offset design for better PCI clearance. It will use Noctua's Torx based SecuFirm2+ mounting system with offset option for AM5, as well as come bundled with NT-H2 thermal paste, NA-TPG1 thermal paste guard for AM5, and NA-ISW1 shim-washers for improved contact on LGA1700 sockets. Noctua will launch three different versions, the standard version with medium base convexity, as well as two new versions LBC and HBC, with low base and high base convexity. The new NH-D15 G2 should launch later this month.

Noctua is preparing a major design update for its NF-A series fans. The company is preparing its next-generation fans with the new Sterrox liquid-crystal polymer material. LCP provides superior structural stability for the blades at high RPM, allowing them to maintain their correct profile, and maximizing their airflow and noise characteristics; in comparison to impellers made from conventional thermoplastics such as LDPE, PBT, PVC, ABS, etc. LCPs also feature very high strength-to-weight ratio, which is what makes another popular kind of LCP, Kevlar, the material of choice for anti-ballistic armors.

For case fans, the impeller has such structural strength to hold its shape, that Noctua has reduced clearance between the impeller and the bore of the frame to under 1 mm, which helps guide all of the fan's airflow axially. Other design innovations to the impeller include channels that accelerate airflow toward the edges of the fan blades, and a stepped inlet structure toward the impeller hub that creates a pressure-differential, and guides the air better toward the impeller blades. The fan hub is metal reinforced, and the motor uses an SSO2 fan bearing. The frame of the fan, has integrated anti-vibration pads. Noctua plans to launch the next-gen 140 mm A-series case fan in Q1-2024.

Noctua has started teasing for the upcoming launch of their latest-generation fan design, based in more than four years of development on new materials that shed some of PBT's known weaknesses. The new fan line was first announced at Computex 2017, and at that time, the development resources poured into the project were well over more than four years and 200 test designs (we already wrote an exhaustive piece on these new fans, if you want to know more or need a refresher).

Noctua says these new fans will be twice as good as their existing ones; the company showed at Computex 2017 how a single A-series fan achieved identical temperatures to a setup which used two NF-F12 fans on the same processor, workload, and heatsink. And you thought the NF-F12 were good already, right? There's no actual release date for now, but there's a teaser image of the packaging doing the rounds already - and if that's that far along finished, then we're certainly not that far away from release. Here's hoping pricing will be competitive - but perhaps it needn't be, considering the expected performance - and the fact that Sterrox, the compound used in their manufacturing, is four times more expensive than common PBT.

Noctua, a company well-known for the performance and acoustic characteristics of their fans (and especially for their love-it-or-hate-it brown and tan fan color scheme) has showcased their next-generation A-series fans, which took the company more than four years and 200 test designs to achieve. This is surely a case of discovering how to not make a product in 200 different ways. Noctua only had to get it right once; and it would seem they did.

Noctua are promising unparalleled performance at the A-Series noise levels. The reasons for this are varied, but one of them - perhaps the most important - comes from the fact that Noctua has ditched PBT - the plastic most commonly used in this kind of products - for a completely new compound, which the company calls Sterrox. Sterrox is a liquid crystal polymer of the same family as Kevlar. This means it has an ordered molecular structure (whereas PBT manifests a chaotic one), which means Sterrox is a much more rigid compound. This helps the fans keep their shape after spinning for long periods of time - something which happens with PBT-made fans. The chaotic structure and lower rigidity means the material deforms due to the centrifugal forces, effectively elongating the fan blades (an effect dubbed impeller creep), which means usual fan designs have to take this into account, usually by increasing the gap between the frame and the fan blades. Noctua aimed for a 0.5 mm tip clearance (much lower than the usual 1.5 or 2 mm), which results in much better air and noise performance. A narrower gap means that less air leaks through it back to the front of the fan, which allows more air to be pushed through heatsinks and radiators. And the fact that the fan blades are more rigid means they don't suffer microscopic wobbles and vibrations on the surface when spinning - hence, quieter. But how good are these new fans, really?