5 Best Air CPU Coolers in 2026 for Ryzen X3D and Intel Core Ultra

The Noctua NH-D15 G2 chromax.black is an enthusiast-class dual-tower air cooler aimed at builders running high-heat CPUs on AMD AM5/AM4 or Intel LGA1851/LGA1700 platforms. It is the kind of cooler you buy when you want strong sustained cooling without committing to an AIO loop.

The key change in the G2 revision is the heatsink and airflow stack: 8 heatpipes, 20% more surface area, and two NF-A14x25r G2 PWM fans. Per the product listing, it typically lands about 2 to 3°C cooler than the first-generation NH-D15 chromax.black on popular modern AMD and Intel CPUs, which can matter for boost behavior and fan noise under long renders or heavy all-core loads.

Physically, this is a large cooler (168mm tall with fans, 150mm wide, 152mm deep) built from a copper base and heatpipes with aluminum fins, soldered joints, and nickel plating. The all-black chromax finish is aimed at builds that want the NH-D15 layout without the classic Noctua color palette.

The trade-offs are mostly fitment and mass. With both fans installed, RAM clearance is listed at 32mm (59mm in single-fan mode), and the cooler height can increase if you have taller-than-32mm memory and need to raise the front fan. At 1525g with fans, it also demands careful installation and sensible case handling if the system is moved often.

Buy this if you have the case clearance and want a no-nonsense, high-end air cooler with a complete mounting and accessory kit, including NT-H2 paste and an AM5 paste guard. Skip it if your case is tight on CPU cooler height, you run tall RGB RAM you do not want to compromise on, or you prefer the guaranteed socket-area clearance and weight distribution of an AIO.

CPU and socket: In the box, it supports AMD AM5 and AM4 plus Intel LGA1851, LGA1700, LGA1200, and LGA115x. If you are planning an AM5 build with CPUs like Ryzen 7/9 X3D parts or Ryzen 9 non-X3D (examples are cited in the listing), this cooler is sized for sustained boost behavior without requiring liquid cooling.

Case clearance: The cooler is 168mm tall with fans, so your case should allow at least 168mm CPU cooler height. The listing also notes height can increase if your RAM is taller than 32mm and forces you to raise the front fan.

RAM and fan placement: Plan around the stated RAM clearances: 32mm with both fans, or 59mm in single-fan mode. If you use tall RGB memory, consider running a single fan first, then add the second only if your case and RAM height allow.

PCIe slot access: The offset design and recessed lower fins are intended to clear the top PCIe x16 slot on most current motherboards, which helps avoid interference with a primary GPU. Always sanity-check with Noctua’s compatibility information for your specific board and GPU backplate layout.

Install process and maintenance: The Torx-based SecuFirm2+ system includes a T20 screwdriver, and the box includes NT-H2 paste plus the AM5 NA-TPG1 paste guard and a cleaning wipe. If you repaste often, the included guard can help keep paste off the AM5 socket area.

Handling and transport: At 1525g with fans, this is a heavy cooler, typical for flagship dual-tower designs. If the PC will be shipped or carried frequently, handle it carefully and avoid impacts that could stress the motherboard.

The Noctua NH-D15 G2 is a flagship air cooler targeting builders running high-TDP CPUs like the Ryzen 9 9950X or Core Ultra 285K on AMD AM5 or Intel LGA1851. Eight heatpipes and a 20% larger fin stack deliver measurable gains over the original NH-D15, with owner reports and Noctua's own data citing a 2-3°C improvement on modern platforms. The dual NF-A14x25r G2 fans use speed-offset tuning to reduce acoustic interference under load. RAM clearance drops to 32mm with both fans mounted, so verify kit height first. Skip if your case clears less than 168mm or you prefer an AIO for aesthetics.

The Noctua NH-D15S chromax.black is an enthusiast-grade air cooling solution that addresses the primary drawback of flagship dual-tower coolers: compatibility. While the original NH-D15 often overhangs RAM slots and the primary PCIe slot, the S-variant utilizes an asymmetrical layout to shift the mass away from the GPU. This makes it an ideal choice for users building high-performance workstations or gaming rigs using Ryzen 9 or Core i9 processors where space around the socket is at a premium.

Thermal performance remains near the top of the air-cooling category. By utilizing a single NF-A15 140mm fan positioned between the two towers, the cooler leverages high-fin surface area to dissipate heat effectively. Users can expect sufficient thermal headroom for heavy multi-threaded workloads like video rendering or 3D modeling, typically maintaining temperatures well within safe limits for modern silicon even under sustained loads.

The build quality is characteristic of Noctua's premium line, featuring a copper base and heatpipes that are nickel-plated and soldered to aluminum fins. The chromax.black treatment is applied evenly across the heatsink, fan, and mounting hardware, providing a uniform look that avoids the industrial beige and brown color scheme of the standard line. This makes it a versatile choice for modern builds with tempered glass side panels.

One trade-off of this design is that while it clears the PCIe slot, the 160mm height is still substantial. It will not fit in many SFF or narrow mid-tower cases. Additionally, while it includes clips for a second fan, adding one will immediately nullify the RAM clearance benefits that define this specific model. It is a specialized tool for a specific set of clearance challenges.

Final verdict: Buy this cooler if you need flagship-tier air cooling but are using tall RAM or a motherboard with a high-positioned PCIe x16 slot. Skip this if you are using low-profile RAM and have a large enough case, as the standard dual-fan NH-D15 provides slightly better out-of-the-box thermals for a similar footprint.

CPU and Socket: This cooler is fully compatible with the latest AMD AM5 and Intel LGA1851/1700 sockets. The SecuFirm2 mounting system uses a backplate-based installation for Intel and the stock backplate for AMD, ensuring a secure fit for high-TDP processors like the Ryzen 9950X or Core Ultra 285K.

Case Clearance: Ensure your chassis supports a CPU cooler height of at least 160mm. While this fits most standard mid-tower cases, always verify the manufacturer's clearance spec, especially in 'slim' or 'compact' tower designs where the side panel may interfere with the heatpipe tips.

RAM and PCIe: The asymmetrical offset is designed to clear the top PCIe x16 slot on ATX and mATX motherboards. If your motherboard has an M.2 slot above the PCIe slot, check for clearance with tall M.2 heatsinks. The 66mm RAM clearance is sufficient for almost all high-end DDR5 modules, including those with integrated RGB lighting.

Fan Configuration: The included NF-A15 fan should be installed in the center of the two towers for optimal performance. If adding a second 120mm or 140mm fan to the front tower, be aware that you will need to raise the fan height to clear RAM, which will increase the total height of the cooler beyond 160mm.

Thermal Paste: The package includes a tube of NT-H1 thermal compound. For modern CPUs with offset chiplets (like Ryzen), a pea-sized amount in the center or a thin spread is recommended to ensure full coverage of the integrated heat spreader (IHS).

The Thermalright Phantom Spirit 120SE is a budget-tier CPU air cooler targeting builders replacing stock coolers on AMD AM4/AM5 or Intel LGA1700/1851 platforms. Seven 6mm heat pipes using AGHP 4.0 technology counteract gravity-induced flow loss in vertical and horizontal orientations, while the pure copper base with anodized aluminum fins maximizes surface area for heat transfer. Dual TL-C12B V2 PWM fans deliver up to 66 CFM at a noise floor that appears competitive based on owner reports. The 154mm height requires case clearance verification before purchase. Skip if your chassis has less than 160mm CPU cooler clearance or if you need RGB integration.

The Thermalright Peerless Assassin 120 SE is a mid-range dual-tower CPU air cooler aimed at PC builders who want AIO-adjacent cooling behavior without the pump, tubes, and radiator fitment. It targets mainstream gaming rigs and productivity desktops on AMD AM4/AM5 and current Intel sockets.

Its defining hardware trait is the combination of a dual-tower fin stack, six 6mm heatpipes, and two 120mm PWM fans rated up to 1550 RPM. In this class, you should expect it to handle sustained all-core loads better than small single-tower coolers, assuming case airflow is competent and the CPU power limits are reasonable for air cooling.

Thermalright lists AGHP (anti-gravity heat pipe) technology to reduce performance dependence on mounting direction, which can matter in unconventional layouts. The cooler uses an aluminum heatsink, a copper base, and copper sintered heatpipes, and it includes TL-C12C fans with S-FDB bearings for smoother operation and longevity.

The main practical constraints are physical, not electrical: at 155mm tall and with a wide dual-tower layout, you need to verify case clearance and be mindful of RAM height and nearby motherboard heatsinks. Like many large air coolers, final fit can vary by motherboard slot placement and how you route the fan clips.

Buy this if you want a serious dual-tower air cooler with included paste and broad socket support for a high-value build. Skip this if your case is tight on CPU cooler height, you run very tall DIMMs, or you specifically want the clearance simplicity of a smaller single-tower design.

CPU and socket: The listing specifies support for AMD AM4 and AM5, plus Intel 115X, 1200, 1700, and 17XX. The title also mentions LGA1851, so confirm your exact Intel socket support in the current listing or with the included bracket set before starting a build.

Case clearance: This cooler is 155mm tall, so check your case’s maximum CPU cooler height spec. Dual-tower coolers also need lateral room around the CPU socket, especially in compact mid-towers.

RAM and motherboard fit: Even with the listing’s note about leaving room for memory, clearance still depends on DIMM heatspreader height and which slots your motherboard uses closest to the CPU. If your RAM is tall, plan to adjust fan height or choose lower-profile DIMMs.

AMD backplate requirement: For AM4/AM5 installation, the listing states you must use the motherboard’s original built-in backplate, which is not included. If you bought your board used, verify the backplate is present.

Fan control and airflow: The included fans are 4-pin PWM, so connect them to a CPU_FAN header (and CPU_OPT if available) for automatic ramping. For best results with a dual-tower cooler, pair it with at least one rear exhaust fan and sensible front intake airflow.