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AMD AM4 Backplate - CPU Heatsink Bracket - Motherboard Mounting Hole 90x54mm - S vs Thermalright Assassin King 120 SE ARGB CPU Air Cooler

Updated August 2026The Thermalright Assassin King 120 SE offers superior cooling performance and compatibility, making it the better choice for high-performance setups. The AMD AM4 Backplate is a budget-friendly option for those needing a simple mounting solution.

The Thermalright Assassin King 120 SE offers superior cooling performance and compatibility, making it the better choice for high-performance setups. The AMD AM4 Backplate is a budget-friendly option for those needing a simple mounting solution.

Why AMD AM4 Backplate - CPU Heatsink Bracket - Motherboard Mounting Hole 90x54mm - S is better

price

AMD AM4 Backplate is significantly cheaper at C$5.85

installation

AMD AM4 Backplate offers straightforward installation for AM4 CPUs

specific use

AMD AM4 Backplate is designed specifically for AM4 motherboards

Why Thermalright Assassin King 120 SE ARGB CPU Air Cooler is better

cooling performance

Thermalright Assassin King 120 SE supports TDP of 125 to 235W

compatibility

Thermalright Assassin King 120 SE supports multiple Intel and AMD sockets

noise level

Thermalright Assassin King 120 SE operates at a maximum noise level of 25.6 dB(A)

Overall score

AMD AM4 Backplate - CPU Heatsink Bracket - Motherboard Mounting Hole 90x54mm - S
55
Thermalright Assassin King 120 SE ARGB CPU Air Cooler
85

Specifications

SpecAMD AM4 Backplate - CPU Heatsink Bracket - Motherboard Mounting Hole 90x54mm - SThermalright Assassin King 120 SE ARGB CPU Air Cooler
PriceC$5.85C$24.59
MaterialABS + CopperAluminum
Fan SpeedN/A1550 RPM
TDP SupportN/A125-235W
Noise LevelN/A≤25.6 dB(A)

Dimension comparison

AMD AM4 Backplate - CPU Heatsink Bracket - Motherboard Mounting Hole 90x54mm - SThermalright Assassin King 120 SE ARGB CPU Air Cooler

Overview of the Products

In this comparison, we will examine the AMD AM4 Backplate and the Thermalright Assassin King 120 SE ARGB CPU Air Cooler. The AMD AM4 Backplate is priced at C$5.85, while the Thermalright Assassin King 120 SE is significantly more expensive at C$24.59. While the backplate serves as a mounting solution specifically for AM4 motherboards, the Thermalright cooler offers a comprehensive cooling solution with advanced features.

Design and Build Quality

The AMD AM4 Backplate features a precision-crafted design specifically tailored for AM4 socket CPUs. This ensures an exact fit and a secure hold for hardware heatsinks. Crafted from high-quality ABS plastic and copper, it maximizes heat dissipation. In contrast, the Thermalright Assassin King 120 SE has a more robust structure with a heat sink made of aluminium, measuring 120x73x148mm. This size accommodates a standard CPU cooler while also supporting a variety of Intel and AMD platforms. The choice of materials in both products highlights their intended functions, with the backplate focusing on structural integrity and the cooler on efficient heat management.

Cooling Performance

When it comes to cooling performance, the Thermalright Assassin King 120 SE excels with its advanced features. The cooler employs five 6mm heat pipes that utilize AGHP III technology, designed to mitigate the inverse gravity effect in various orientations. It supports a total thermal design power (TDP) of 125 to 235W, making it a powerful option for high-performance CPUs. On the other hand, the AMD AM4 Backplate optimizes cooling by ensuring stable mounting pressure, which is crucial for effective heat transfer. However, it does not provide cooling functionality on its own and is designed solely as a mounting accessory.

Compatibility

Compatibility is a significant aspect in choosing cooling solutions. The AMD AM4 Backplate is exclusively designed for the AM4 platform, ensuring it fits AMD socket CPUs without any issues. In contrast, the Thermalright Assassin King 120 SE is versatile, supporting multiple Intel sockets (115X/1200/1700/17XX) and AMD sockets (AM4, AM5). This broader compatibility makes the Thermalright cooler a more flexible option for users with different CPU platforms.

Noise Level and Operation

The Thermalright Assassin King 120 SE is designed with low noise operation in mind, featuring a PWM fan that operates at a maximum noise level of 25.6 dB(A). This low noise design is complemented by a fan speed of 1550 RPM, providing efficient cooling without significant auditory distraction. The AMD AM4 Backplate, being a simple mounting solution, does not produce any noise on its own but is reliant on the performance of the CPU cooler it supports. Users seeking a silent operation would benefit more from the Thermalright cooler in this regard.

Installation Process

The installation process can vary significantly between the two products. The AMD AM4 Backplate is straightforward, designed specifically for AM4 CPUs, ensuring an easy installation that optimizes the cooling system of the PC. On the other hand, the Thermalright Assassin King 120 SE comes equipped with metal fasteners for both Intel and AMD platforms, which may require more time and effort to install but offers a comprehensive setup for cooling. Users who prioritize simplicity may find the backplate more appealing, while those looking for a full cooling solution may opt for the cooler despite its potentially more complex installation.

Price Consideration

Pricing is a crucial factor when making a decision. The AMD AM4 Backplate is priced at C$5.85, making it an affordable option for those who need a simple mounting solution. In contrast, the Thermalright Assassin King 120 SE is priced at C$24.59, reflecting its advanced cooling capabilities and broader compatibility. While the backplate offers value for its specific function, the cooler provides a more comprehensive solution for users looking to enhance their CPU's performance and cooling efficiency.

Which should you buy?

Choosing between the AMD AM4 Backplate and the Thermalright Assassin King 120 SE largely depends on your needs. If you’re looking for an affordable and straightforward mounting solution specifically for AM4 motherboards, the AMD AM4 Backplate is a solid choice at C$5.85. However, if you require a high-performance cooling solution with versatile compatibility across different CPU platforms, the Thermalright Assassin King 120 SE, despite its higher price of C$24.59, would be the better investment. Ultimately, your choice will depend on whether you need a simple mounting solution or a comprehensive cooling system.

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AMD AM4 Backplate - CPU Heatsink Bracket - Motherboard Mounting Hole 90x54mm - S vs Thermalright Assassin King 120 SE ARGB CPU Air Cooler | versusfinder