ID-COOLING SE-903-XT V2 Black CPU Air Cooler, vs Thermalrlght Peerless Assassin 120 SE CPU Air
Updated August 2026 — ID-COOLING SE-903-XT V2 Black CPU Air Cooler, wins on noise level, Thermalrlght Peerless Assassin 120 SE CPU Air wins on cooling and installation.
The ID-COOLING SE-903-XT V2 offers great value for budget-conscious users, while the Thermalrlght Peerless Assassin 120 SE excels in cooling performance. Choose based on your specific needs.
Why ID-COOLING SE-903-XT V2 Black CPU Air Cooler, is better
Price
ID-COOLING is significantly cheaper at $14.99.
Size
ID-COOLING has a more compact design for small cases.
Noise
ID-COOLING is designed for low noise operation.
Why Thermalrlght Peerless Assassin 120 SE CPU Air is better
Cooling
Peerless Assassin has six heat pipes for better cooling.
Fans
Peerless Assassin features dual 120mm fans for higher airflow.
Build Quality
Peerless Assassin has a premium aluminum heatsink cover.
Overall score
Specifications
| Spec | ID-COOLING SE-903-XT V2 Black CPU Air Cooler, | Thermalrlght Peerless Assassin 120 SE CPU Air |
|---|---|---|
| Price | $14.99 | $32.90 |
| Airflow | 50 CFM | 66.17 CFM |
| Noise Level | Low | 25.6 dB(A) |
| Compatibility | Intel & AMD | Intel & AMD |
| Installation | Easy | Complex |
Dimension comparison
Overview of the ID-COOLING SE-903-XT V2 Black and Thermalrlght Peerless Assassin 120 SE
The ID-COOLING SE-903-XT V2 Black is priced at $14.99, while the Thermalrlght Peerless Assassin 120 SE costs $32.90, making the ID-COOLING about 55% cheaper. Both products cater to users looking for efficient cooling solutions for their CPUs, but they approach this goal with different designs and technologies. The ID-COOLING emphasizes a compact design and low noise, whereas the Peerless Assassin boasts advanced technology with more heat pipes and dual fans for enhanced cooling performance.
Cooling Performance
When it comes to cooling performance, the Thermalrlght Peerless Assassin 120 SE has an edge due to its six heat pipes and dual 120mm fans, which can deliver a rated airflow of 66.17 CFM. This setup allows for rapid heat exchange, making it suitable for high-performance CPUs. In contrast, the ID-COOLING SE-903-XT V2 features a single 100mm fan with an upgraded design that improves airflow efficiency, but it may not match the sheer cooling capabilities of the Peerless Assassin, especially under heavy loads.
Design and Aesthetics
The design of the ID-COOLING SE-903-XT V2 Black is compact and refined, making it a great fit for small and mid-size cases, including ITX and mATX systems. Its upgraded fin-lock structure enhances durability and reduces vibration. On the other hand, the Thermalrlght Peerless Assassin 120 SE sports an aluminum heatsink cover with an anodized brushed black top, which adds a premium feel to its appearance. The asymmetric layout of the Peerless Assassin also improves compatibility with graphics cards, making it a strong contender for those who prioritize aesthetics alongside performance.
Noise Levels
Noise levels are an important consideration for many PC builders. The ID-COOLING SE-903-XT V2 is specifically designed for low noise operation, making it suitable for both gaming and office environments. Although exact decibel levels are not provided, its larger 100mm fan is engineered to maintain balanced noise levels while improving airflow. In contrast, the Thermalrlght Peerless Assassin 120 SE lists a maximum noise level of 25.6 dB(A). While this is relatively quiet, it may still be slightly louder than the ID-COOLING under certain conditions, particularly during intense CPU usage.
Installation Process
The ID-COOLING SE-903-XT V2 features an upgraded universal mounting bracket that simplifies installation for both Intel and AMD platforms. This user-friendly design can significantly reduce the time and effort required for setup. On the other hand, the Thermalrlght Peerless Assassin 120 SE employs a more complex SS2 install system, which includes a metal pressure plate for better CPU contact. While this can improve performance, it may also complicate the installation for less experienced builders, particularly as it requires the use of the motherboard's built-in backplate for certain installations.
Compatibility
Compatibility is crucial when choosing a CPU cooler. The ID-COOLING SE-903-XT V2 is designed with a low-profile footprint, which helps prevent interference with RAM and motherboard components, making it a versatile choice for various builds. The Thermalrlght Peerless Assassin 120 SE is compatible with a wide range of Intel and AMD sockets, including LGA 1700 and AM4/AM5, but users need to ensure their case can accommodate its larger dimensions of 125mm x 135mm x 155mm. This can limit options for smaller cases, making the ID-COOLING a more universally compatible choice.
Target Audience
The ID-COOLING SE-903-XT V2 is ideal for casual users and gamers who prioritize a compact and quiet solution without sacrificing cooling efficiency. At $14.99, it offers excellent value for those on a budget. Conversely, the Thermalrlght Peerless Assassin 120 SE, priced at $32.90, targets more performance-oriented users who may be overclocking their CPUs or running demanding applications. Its advanced features and higher cooling capacity justify the price for those who need robust performance.
Customer Satisfaction
While specific sales ranks and customer satisfaction ratings are not provided, the differences in price and features suggest that both products have their unique strengths. The ID-COOLING SE-903-XT V2, being significantly cheaper, may attract budget-conscious consumers looking for reliable performance. The Thermalrlght Peerless Assassin 120 SE, with its advanced technology and dual fans, may appeal to enthusiasts willing to invest more for better cooling capabilities and aesthetics.
Which should you buy?
In conclusion, the choice between the ID-COOLING SE-903-XT V2 Black and the Thermalrlght Peerless Assassin 120 SE ultimately comes down to your specific needs and budget. If you are looking for a cost-effective, compact cooler that provides decent performance and low noise levels, the ID-COOLING SE-903-XT V2 at $14.99 is an excellent choice. However, if you require superior cooling performance and are willing to invest $32.90 for advanced features, the Thermalrlght Peerless Assassin 120 SE is likely the better option. Each cooler has its merits, and understanding your priorities will guide you to the right decision for your build.

