Thermalright TL-C12C-S CPU Fan vs Noctua NF-A4x20 PWM
Updated August 2026 — The Thermalright TL-C12C-S offers better airflow and aesthetic features, while the Noctua NF-A4x20 PWM excels in quiet operation and compact design.
The Thermalright TL-C12C-S offers better airflow and aesthetic features, while the Noctua NF-A4x20 PWM excels in quiet operation and compact design.
Why Thermalright TL-C12C-S CPU Fan is better
Airflow
Thermalright TL-C12C-S provides 66.17 CFM airflow.
Lighting
Thermalright TL-C12C-S has customizable ARGB lighting.
Price
Thermalright TL-C12C-S is cheaper at £15.90.
Why Noctua NF-A4x20 PWM is better
Noise Level
Noctua NF-A4x20 PWM operates at 14.9 dBA.
Compact Size
Noctua NF-A4x20 PWM is ideal for tight spaces.
MTTF
Noctua NF-A4x20 PWM has >150,000 hours MTTF.
Overall score
Specifications
| Spec | Thermalright TL-C12C-S CPU Fan | Noctua NF-A4x20 PWM |
|---|---|---|
| Max Speed | 1500 RPM | 5000 RPM |
| Noise Level | ≤ 25.6 dBA | 14.9 dBA |
| Airflow | 66.17 CFM | 0 |
| Connector | 4-pin PWM | 4-pin PWM |
| Bearing Type | S-FDB | Unknown |
Dimension comparison
Overview of the Thermalright TL-C12C-S CPU Fan and Noctua NF-A4x20 PWM
The Thermalright TL-C12C-S CPU Fan is priced at £15.90, while the Noctua NF-A4x20 PWM comes in at £18.40. This pricing difference may influence your choice depending on your budget. Both fans are designed for effective cooling but cater to different needs and applications.
Performance Comparison
The Thermalright TL-C12C-S boasts a maximum speed of 1500 RPM with a noise level of ≤ 25.6 dBA, providing a balance between performance and quiet operation. It can generate an air flow of 66.17 CFM, which is substantial for a case fan or CPU cooler. In contrast, the Noctua NF-A4x20 PWM reaches a remarkable maximum speed of 5000 RPM, although it operates at a quieter 14.9 dBA due to its advanced design. This fan is ideal for environments where high airflow is essential, particularly in 1U servers or networking devices.
Design and Build Quality
The Thermalright TL-C12C-S features quality S-FDB bearings that minimise fan noise while enhancing cooling performance. Its dimensions are typical for a 120mm fan, allowing it to fit in a variety of cases and setups. The Noctua NF-A4x20 PWM, on the other hand, has a compact size of 40x40x20 mm, making it perfect for tight spaces. Notably, it includes anti-vibration mounts and various adaptors for flexible installation, which can be a significant advantage in multi-device setups.
Noise Levels
When it comes to noise levels, the Thermalright TL-C12C-S operates at a maximum of 25.6 dBA, which is relatively quiet but may be noticeable in silent environments. Conversely, the Noctua NF-A4x20 PWM, with its maximum noise level of 14.9 dBA, is engineered for whisper-quiet operation, making it an excellent choice for users who prioritise a silent working environment. This lower noise output is especially beneficial in home theatre PCs or office settings.
Cooling Efficiency
In terms of cooling efficiency, the Thermalright TL-C12C-S delivers an impressive air flow of 66.17 CFM, suitable for larger cases or as part of a cooling array in CPU coolers. This performance is critical when managing heat from high-performance components. In contrast, the Noctua NF-A4x20 PWM, while smaller in size, is designed with Flow Acceleration Channels, which enhance airflow and cooling efficiency even at lower RPMs. Its maximum speed of 5000 RPM allows for rapid cooling when necessary, making it versatile for various applications.
Installation and Compatibility
The Thermalright TL-C12C-S is designed with a 4-pin PWM connector, allowing for automatic speed control based on the motherboard's temperature readings. It also includes a generous 55cm cable for flexible installation options. The Noctua NF-A4x20 PWM also features a 4-pin PWM interface and comes with an array of installation accessories, including anti-vibration mounts and a Y-cable, making it adaptable for various setups, especially in servers or networking equipment. This versatility can be a deciding factor for users with specific installation needs.
Aesthetics and Lighting
Aesthetic appeal is a consideration for many builders, and the Thermalright TL-C12C-S does not disappoint with its ARGB lighting, which features 17 modes of light effects. This allows users to customise their setup to match their build aesthetics. In contrast, the Noctua NF-A4x20 PWM focuses more on performance than on visual flair, foregoing RGB lighting for its functional design. Users looking to enhance their PC's visual aspect may find the Thermalright fan more appealing.
Which should you buy?
In conclusion, the decision between the Thermalright TL-C12C-S and the Noctua NF-A4x20 PWM hinges on your specific needs. If you require a high-performance fan with a robust air flow and aesthetic lighting options, the Thermalright TL-C12C-S at £15.90 is a strong contender. However, if you prioritise ultra-quiet operation and need a compact fan for tight spaces, the Noctua NF-A4x20 PWM, despite its higher price of £18.40, may be the better choice. Ultimately, both fans excel in their respective categories, making either a solid investment depending on your cooling requirements.
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