Noctua NH-D15 G2 Round-Up Review

Despite its historically brown and beige color scheme, which isn’t as appealing to some users, Noctua is renowned for its CPU coolers. They have consistently made a handful of coolers that top the charts, notably the NH-D14, NH-D15, and the venerable NH-U12A.

Today, we are looking at Noctua’s next-generation heavy hitters: the NH-D15 G2, alongside its specialized variants, the NH-D15 G2 LBC (Low Base Convexity) and NH-D15 G2 HBC (High Base Convexity). We’ve put them through long-term testing to see how they hold up and whether these specialized base shapes actually make a difference.

Unboxing & First Impressions

Right off the bat, Noctua makes sure you know exactly what you are getting. Because there are three different variants of this cooler, the packaging for each is properly and clearly labeled so you won’t accidentally pick up the wrong version at the store.

True to Noctua’s premium reputation, the unboxing experience remains top-tier. Everything is meticulously organized inside very properly made boxes with dedicated compartments keeping the different hardware components perfectly separated.

The included accessories package is incredibly generous and leaves you needing nothing else for installation:

• A high-quality screwdriver
• Full mounting brackets for both Intel and AMD platforms
• Matching washers for both Intel and AMD brackets
• The NA-TPG1 thermal paste guard for AMD AM5 CPUs, which is a fantastic inclusion to prevent excess thermal paste from oozing into the gaps around the CPU’s integrated heat spreader (IHS) capacitors
• A PWM Y-splitter cable
• Low-Noise Adaptors (L.N.A.)
• NA-CW1 cleaning wipes
• A premium metal Noctua case badge

As soon as you pull the cooler itself out of the box, the familiar, massive silhouette of the original NH-D15 is immediately apparent. However, a closer inspection reveals significant updates.

While the iconic dual-tower footprint remains, the upgrade to a whopping 8 heatpipes and the newly engineered NF-A14x25r G2 PWM fans immediately differentiate this generation from its predecessor, promising serious thermal performance.

Test System Setup & Thermal Performance

To truly test the mettle of these premium air coolers, we configured three separate high-end test benches, with each CPU’s power draw configured at a steady 200W under 28°C ambient temperature. Testing was conducted over an extended period to monitor stability and consistency using the ElmorLabs KTH-USB.

We also threw in the older NH-U12A and the DeepCool LM360 WH AIO 360mm liquid cooler to serve as performance baselines.

Intel Core i9-14900K (LGA1700) @ 200W

Intel Core Ultra 9 285K (LGA1851) @ 200W

AMD Ryzen 9 9950X (AM5) @ 200W

Performance Breakdown & Thermal Paste Synergy

Looking at the numbers, the standard NH-D15 G2 proves to be a fantastic all-rounder for both Intel and AMD platforms, comfortably beating the older NH-U12A by up to 1.8°C.

But what about those specific LBC and HBC variants?

• LBC (Low Base Convexity): This variant is a special case. For LGA1700 users on the i9-14900K, the LBC version shaved off an extra 0.7°C compared to the standard G2 due to better mating with the CPU’s integrated heat spreader (IHS). However, on the newer LGA1851 socket (Core Ultra 9 285K), that performance gap shrinks to a muddy 0.4°C, making the specialized base less necessary there.
• HBC (High Base Convexity): On the AMD side, the HBC variant shines nicely for AM5 users. Paired with the Ryzen 9 9950X, it knocked the temperature down to 86.8°C, closing the gap with a full-sized 360mm AIO to just over 1 °C.

During our extended testing, we also found that getting the absolute most out of these contact plates depends heavily on your choice of thermal interface material. Noctua’s bundled NT-H2 is excellent and remains our baseline recommendation, but if you like to experiment, we found that Thermalright TF8, Cooler Master Cryofuze, and Arctic MX-6 all offer highly consistent results with the G2.

Final Thoughts

The Noctua NH-D15 G2 series represents the absolute pinnacle of air cooling engineering, but it comes with a major caveat: the price.

Retailing at RM 627, these are incredibly expensive air coolers. In fact, that price tag places them directly in competition with quite a handful of 360mm AIO liquid coolers, like the DeepCool LM360 WH, which predictably offer better overall thermal headroom.

Because of this, we won’t be recommending the G2 line to mainstream or budget-oriented builders. However, if you are an air-cooling purist who values mechanical simplicity, long-term reliability without pump-failure anxiety, and you love what the premium Noctua eco-system brings to the table, the NH-D15 G2 series remains a stellar, top-tier choice.