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High-quality, elegant as well as timeless design and technical innovation - these are the features of the Alphacool Apex Stealth metal fan. With its patent-pending decoupling technology, the robust metal frame and a special rotor, this fan certainly impresses. Not only is the Apex Stealth one of the most powerful fans, but it also remains the quietest at any speed.
• High performance and whisper quiet
• Patent pending decoupling technology
• Frame made of high quality metal
• Suitable for cases as well as radiators
• Controllable via PWM + Zero-RPM Control
Whisper Quiet
The fan blades, motor and its suspension are completely decoupled from the metal frame. For this purpose, a special damping system was placed between the metal frame and the fan, which absorbs all vibrations. This type of decoupling is a completely new system, which is brought to the market by Alphacool for the first time with the Apex fan. In addition, the impeller is equipped with a closed frame that prevents the impeller tips from fluttering at high speed, which also has a positive effect on the fan's characteristics.
Powerful All-rounder
The Alphacool Apex Stealth metal fan is a true all-rounder. It sets new standards in terms of airflow and static pressure. Therefore, this fan is not only perfect for mounting on radiators, but also provides excellent airflow as a case fan. The Apex Stealth can be controlled between 0 to 3000 rpm via the 4-pin PWM connector. The startup speed is ~500 rpm. In addition, the Stealth offers Zero RPM control, which can be used to bring the fan to a complete stop.
Apex Design
Alphacool's Apex product line represents the highest level of perfection. First-class materials and innovative technologies guarantee a unique premium product. Consisting of high-quality metal, the curved frame gives the Apex Stealth its distinctive design and fits perfectly into any PC build.
Additional Features
As usual with Alphacool, multiple fans can be effortlessly connected in series via daisy chain. The cables can be hidden in the corners of the fan so that they are no longer visible. A 50 cm PWM cable is also included as an extension. The 6-pole motor in combination with the HDB bearing (Hydro Dynamic Bearing) ensures extremely quiet operation and high durability.
Technical details :
Dimensions (L x W x H) : 120 x 120 x 25mm
Material (Frame) : Zinc injection molding (Zamak alloy)
Material (Impeller) : Plastic
Weight : 320g
Speed : 0~3000±10% rpm
Bearing : Hydro Dynamic Bearing
Connection : 4-Pin PWM
Cable length PWM : 40±8 mm (+ 50cm extension cable)
Cable length (daisy chain) : 110±10 mm
Start-up Voltage : 6 V DC
Rated Volt : 12 V DC
Power Consumption : 6.60 Watt
Air Flow : 116.89 CFM
Static Air Pressure : 6.22 mmH2O
Noise Level : 40.2 dBA
MTBF : 100.000h
PWM control : Yes
Zero RPM control : Yes
Tacho Signal : Yes
Auto-restart : Yes
Color : chrome
EK-Quantum Phase 120 – Black is a high-performance 120mm radiator fan engineered for liquid-cooling systems where airflow efficiency, static pressure, and acoustic comfort take priority over visual effects. Developed through close collaboration with industry-leading fan engineers, injection-moulding specialists, and EK’s liquid-cooling experts, Phase represents EK’s most refined fan design to date.
Using extensive CFD simulations, every aspect of the blade and hub geometry was optimized to achieve the ideal balance of static pressure, airflow efficiency, and acoustic performance. Unlike conventional fan development - where injection moulding constraints often compromise the intended geometry - Phase was designed from the outset around the realities of high-precision injection moulding. This ensures the final, mass-produced fan remains true to its engineered design, without introducing imbalance, excess noise, or performance loss.
The result is a fan purpose-built for liquid-cooling radiators, where airflow resistance is high, and performance per decibel truly matters. At the same noise level, Phase delivers higher cooling performance; at the same cooling performance, it operates noticeably quieter. This makes it an ideal choice for premium custom loops, high-density radiators, and acoustically optimized systems.
In noise-normalized testing*, the EK-Quantum Phase 120 demonstrates clear advantages over EK’s FPT fan:
These gains are achieved through a geometry optimized for higher static pressure at lower RPM, allowing Phase to maintain strong cooling performance across a wide operating range. When matched for thermal performance, Phase can operate at up to 2.7 dBA lower noise than the FPT fan - resulting in a noticeably quieter system without sacrificing cooling capability.
* All testing was conducted on an EK-Quantum Surface P radiator. Similar performance trends can be expected across other radiator models.
The fan uses a Fluid Dynamic Bearing (FDB) rated for 70,000 hours MTBF, ensuring long-term stability, low mechanical noise, and consistent performance over time. PWM control from 550 to 2200 RPM allows precise tuning for silent operation or maximum cooling, depending on system demands.
Free from RGB lighting, the Phase 120 – Black focuses entirely on function and understated aesthetics. Replaceable rubber corner dampers reduce vibration transfer to the chassis while offering subtle customization options, and a precision aluminum badge on both sides ensures a clean, premium appearance in both push and pull configurations. The matte black finish integrates seamlessly into professional, minimalist, and performance-oriented systems.
The result: lower noise, higher performance, and refined aesthetics - engineered without compromise.
EK-OmniLink – allows daisy chaining of multiple fans, thus reducing cable clutter and greatly easing cable management. The Omni-Link ecosystem of interconnects will be greatly expanded in the near future, allowing additional benefits to users. It uses Micro-fit 8-pin connectors between products.
The EK-OmniLink design resolves the cable clutter issues of unifying the connection of multiple fans onto a single PWM and D-RGB header while still maintaining full flexibility if the user wants to remove a single fan from the chain. Other similar solutions on the market use interlocking mechanisms, which require the removal of the entire fan link if the user needs more room to tighten a fitting on a radiator.
Mechanical and electrical specifications:
Performance characteristics:
Enclosed:
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