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Thermalright Peerless Assassin 120 SE V3 CPU Air vs Thermalright TL-C12C X3 CPU Fan

Updated August 2026 — Thermalright Peerless Assassin 120 SE V3 CPU Air leads on cooling efficien and build quality.

The Thermalright Peerless Assassin 120 SE V3 offers superior cooling performance and compatibility compared to the TL-C12C X3, making it the better choice for high-performance setups.

Why Thermalright Peerless Assassin 120 SE V3 CPU Air is better

Cooling Performance

Higher airflow of 70.84 CFM vs 66.17 CFM

Design

Double-tower design for better heat dissipation

Compatibility

Supports a wider range of CPU sockets

Why Thermalright TL-C12C X3 CPU Fan is better

Price

Significantly cheaper at $11.99

Noise Level

Quieter operation at 25.6 dBA

Installation

Easier installation process

Overall score

Thermalright Peerless Assassin 120 SE V3 CPU Air
85
Thermalright TL-C12C X3 CPU Fan
65

Specifications

SpecThermalright Peerless Assassin 120 SE V3 CPU AirThermalright TL-C12C X3 CPU Fan
Airflow70.84 CFM66.17 CFM
Noise Level29.8 dBA25.6 dBA
Heat Pipes60
Fan TypeDual PWMSingle PWM
CompatibilityWideUniversal

Dimension comparison

Thermalright Peerless Assassin 120 SE V3 CPU AirThermalright TL-C12C X3 CPU Fan

Introduction

When it comes to CPU cooling solutions, the right choice can dramatically affect performance and longevity. In this comparison, we will take a closer look at the Thermalright Peerless Assassin 120 SE V3 CPU Air Cooler and the Thermalright TL-C12C X3 CPU Fan. Both products are designed to enhance cooling efficiency, but they cater to different needs and budgets. The Peerless Assassin 120 SE V3 is priced at $35.90, while the TL-C12C X3 comes in at a significantly lower price of $11.99, making it about 67% cheaper.

Design and Build Quality

The Thermalright Peerless Assassin 120 SE V3 features a robust double-tower design with dual fans, ensuring effective heat dissipation. Its aluminum heatsink cover and six fully electroplated heat pipes are engineered for maximum thermal conductivity. This design allows it to efficiently manage high CPU temperatures, particularly during intense workloads. In contrast, the TL-C12C X3 is a single 120mm fan designed for case cooling and supplementary CPU cooling. While it boasts S-FDB bearings for reduced noise and increased lifespan, its simpler design lacks the advanced cooling capabilities of the Peerless Assassin 120 SE V3.

Cooling Performance

Cooling performance is where the Thermalright Peerless Assassin 120 SE V3 shines, with its dual fans capable of reaching speeds of up to 2000 RPM. This high airflow rate of 70.84 CFM translates to superior heat dissipation, making it suitable for overclocked CPUs and demanding applications. On the other hand, the TL-C12C X3, while effective for general cooling, maxes out at 1550 RPM and provides an airflow of 66.17 CFM. This means the Peerless Assassin can deliver approximately 7% higher airflow, making it a better choice for high-performance setups.

Noise Levels

Noise levels are an important consideration for many PC builders. The Peerless Assassin 120 SE V3 operates at a noise level of approximately 29.8 dBA, which is relatively quiet for a CPU cooler with dual fans. In comparison, the TL-C12C X3 operates at 25.6 dBA, making it quieter than the Peerless Assassin. However, the latter's noise levels are still acceptable given its enhanced cooling capabilities. If absolute silence is your goal, the TL-C12C X3 may be the better option for case cooling.

Compatibility

When it comes to compatibility, the Thermalright Peerless Assassin 120 SE V3 supports a wide range of platforms, including Intel’s LGA 1851/1700/1150/1151/1155/1156/1200 and AMD’s AM4/AM5 sockets. This flexibility makes it suitable for various builds, from budget to high-end systems. In contrast, the TL-C12C X3 is more of a universal fan, designed to work with any case or CPU cooler that supports a 120mm fan. While its compatibility is broad, it does not offer the specialized cooling features of the Peerless Assassin.

Installation Process

Installing the Thermalright Peerless Assassin 120 SE V3 requires a bit more effort due to its dual-tower design and the need for specific mounting accessories. However, it comes with detailed instructions to facilitate the process. Conversely, the TL-C12C X3 is designed for straightforward installation, making it an excellent choice for those who may not want to deal with complex setups. Its 4-pin PWM connector simplifies the integration into existing setups, allowing for quick and hassle-free installation.

Price Point

The Thermalright Peerless Assassin 120 SE V3 is priced at $35.90, while the TL-C12C X3 is available for just $11.99. This means the Peerless Assassin is about 200% more expensive than the TL-C12C X3. However, the price difference reflects the advanced features and superior cooling capacity of the Peerless Assassin, making it a worthwhile investment for those seeking high performance. The TL-C12C X3, while budget-friendly, may not suffice for users needing extensive cooling solutions.

User Feedback

User feedback can provide valuable insights into product performance. The Thermalright Peerless Assassin 120 SE V3 has received positive reviews for its effective cooling and ease of installation, making it a popular choice among enthusiasts. The TL-C12C X3 is also well-reviewed, particularly for its low noise levels and effective cooling in budget builds. However, it may not satisfy users looking for robust cooling under heavy loads. Both products have their dedicated fan bases, but the Peerless Assassin seems to edge out in performance.

Which should you buy?

Choosing between the Thermalright Peerless Assassin 120 SE V3 and the TL-C12C X3 ultimately depends on your cooling needs and budget. If you are looking for a high-performance CPU cooler capable of handling demanding tasks, the Peerless Assassin 120 SE V3 is the clear choice, offering superior airflow and compatibility with a wide range of CPUs. However, if you're on a tight budget and require a reliable, low-noise fan for general cooling, the TL-C12C X3 is an excellent option. Consider your specific requirements to make the best decision for your setup.