Thermalright Assassin X 120 V2 Plus CPU Cooler 4 Heat Pipes with AGHP Technology vs Thermalright SI-100 White ARGB CPU Air Cooler
Updated August 2026 — The Thermalright Assassin X 120 V2 Plus offers better value for money with solid cooling performance, while the SI-100 excels in compact design and quiet operation.
The Thermalright Assassin X 120 V2 Plus offers better value for money with solid cooling performance, while the SI-100 excels in compact design and quiet operation.
Why Thermalright Assassin X 120 V2 Plus CPU Cooler 4 Heat Pipes with AGHP Technology is better
price
Assassin X is C$25.90, SI-100 is C$35.90
height
Assassin X is taller, providing better cooling capacity
installation
Assassin X includes installation video and guide
Why Thermalright SI-100 White ARGB CPU Air Cooler is better
compactness
SI-100 is shorter, suitable for smaller cases
fan design
SI-100 has advanced PWM fan for quieter operation
airflow
SI-100 has higher airflow at 72.37 CFM
Overall score
Specifications
| Spec | Thermalright Assassin X 120 V2 Plus CPU Cooler 4 Heat Pipes with AGHP Technology | Thermalright SI-100 White ARGB CPU Air Cooler |
|---|---|---|
| Cooling Tech | AGHP | AGHP 3.0 |
| Noise Level | N/A | ≤27.7 dB(A) |
| Socket Support | Intel 1150-1700, AMD AM4/AM5 | Intel 1150-2066, AMD AM4/AM5 |
| Max RPM | N/A | 2000 RPM |
| Airflow | N/A | 72.37 CFM |
Dimension comparison
Brand Overview
Both the Thermalright Assassin X 120 V2 Plus CPU Cooler and the Thermalright SI-100 White ARGB CPU Air Cooler are products from Thermalright, a brand established over 20 years ago in Taiwan. The brand holds a significant reputation in the computer accessories market, focusing on innovations like CPU coolers, case fans, and thermal materials. While both products boast Thermalright's expertise, their design and features cater to different user needs, which is crucial when deciding between them.
Design and Build Quality
The Thermalright Assassin X 120 V2 Plus features a robust design with dimensions of 120mm in length, 96mm in width, and 154mm in height. It incorporates four heat pipes made with AGHP technology, allowing for efficient heat transfer and a longer operational life of up to 20,000 hours. In contrast, the Thermalright SI-100 White ARGB has a more compact design, measuring 120mm in length, 108mm in width, and only 100mm in height. This smaller profile makes the SI-100 suitable for smaller cases, but it sacrifices some cooling capacity compared to its taller counterpart.
Cooling Performance
Cooling performance is a critical consideration for any CPU cooler. The Assassin X 120 V2 Plus uses four 6mm heat pipes, which effectively manage heat dissipation. The design supports a higher airflow capacity, contributing to robust cooling performance under load. Conversely, the SI-100 White ARGB utilises six 6mm heat pipes and boasts a maximum airflow of 72.37 CFM at a fan speed of 2000 RPM. Although both coolers are designed with efficiency in mind, the SI-100 may provide slightly better performance in tight spaces due to its advanced fan design, ensuring optimal cooling while maintaining a lower noise level.
Noise Levels
When it comes to noise levels, the Thermalright SI-100 White ARGB operates at a maximum noise level of 27.7 dB(A), which is quite quiet and suitable for users prioritising a silent computing experience. On the other hand, while the Assassin X 120 V2 Plus does not specify a noise level, it is equipped with S-FDB bearings designed to minimise noise during operation. The effectiveness of these bearings suggests that the Assassin X may also perform quietly, but without specific data, it cannot be directly compared to the SI-100's documented performance.
Compatibility
Both coolers offer broad compatibility with various CPU sockets. The Thermalright Assassin X 120 V2 Plus supports Intel sockets 1150 through 1700 and AMD AM4 and AM5, making it a versatile choice for various setups. The Thermalright SI-100 White ARGB matches this versatility, supporting Intel sockets from 1150 to 2066 and AMD AM4 and AM5. Users looking to upgrade their systems in the future can find both coolers accommodating, though the SI-100 offers support for a wider range of Intel sockets, which may appeal to more users.
Installation Process
Ease of installation is an essential aspect for many users, and both coolers provide metal fasteners for easy mounting on Intel and AMD platforms. The Assassin X 120 V2 Plus includes a comprehensive installation guide and video instructions, making it user-friendly for beginners. Similarly, the SI-100 White ARGB comes with its own set of mounting plates and fasteners, ensuring compatibility across its supported sockets. While both products facilitate straightforward installation, the availability of additional resources for the Assassin X may make it a more accessible option for less experienced builders.
Pricing
In terms of pricing, the Thermalright Assassin X 120 V2 Plus is currently priced at C$25.90, making it a more budget-friendly option compared to the Thermalright SI-100 White ARGB, which retails for C$35.90. The significant price difference could influence purchasing decisions, especially for users looking to maximise performance without overspending. This pricing dynamic allows the Assassin X to appeal to cost-conscious consumers while offering solid features.
Which should you buy?
Choosing between the Thermalright Assassin X 120 V2 Plus and the Thermalright SI-100 White ARGB ultimately depends on your specific needs. If you require a more compact cooler for a smaller case and prefer a quiet operation, the SI-100 may be the better choice despite its higher price. However, if you're looking for a cooler that offers excellent value for money, with robust cooling performance and ease of installation, the Assassin X 120 V2 Plus stands out as an excellent option. Both coolers are well-regarded, but your decision should align with your system requirements and budget constraints.
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