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ARCTIC P12 Pro PST - Powerful Premium Fan, vs Thermalright Assassin King 120 SE White ARGB CPU

Updated July 2026 — ARCTIC P12 Pro PST - Powerful Premium Fan, wins on price and speed range, Thermalright Assassin King 120 SE White ARGB CPU wins on aesthetics and compatibility.

The ARCTIC P12 Pro offers excellent value with quiet, efficient cooling at a budget price, while the Thermalright Assassin King provides superior aesthetics and broader compatibility at a higher cost.

Why ARCTIC P12 Pro PST - Powerful Premium Fan, is better

Price

ARCTIC P12 Pro costs $9.49 vs $19.82 for Thermalright

Noise

ARCTIC uses fluid dynamic bearing for quieter operation

Speed Range

ARCTIC fan speed adjustable up to 3000 RPM vs Thermalright 1550 RPM

Why Thermalright Assassin King 120 SE White ARGB CPU is better

Compatibility

Thermalright supports more CPU sockets including Intel and AMD

Aesthetics

Thermalright features ARGB lighting vs ARCTIC's plain black finish

Build Quality

Thermalright has aluminum heatsink and 5 heatpipes vs ARCTIC fan only

Overall score

ARCTIC P12 Pro PST - Powerful Premium Fan,
82
Thermalright Assassin King 120 SE White ARGB CPU
75

Specifications

SpecARCTIC P12 Pro PST - Powerful Premium Fan,Thermalright Assassin King 120 SE White ARGB CPU
Price$9.49$19.82
Fan Speed600-3000 RPM1550 RPM
Noise LevelMinimized by FDB≤25.6 dB(A)
CompatibilityUniversal fan mountingIntel 1150/1151/1200/1700/1851, AMD AM4/AM5
Build MaterialFan only, fluid dynamic bearingAluminum heatsink, 5 heatpipes
LightingNoneARGB lighting
WeightNot specified0.64 kg

Dimension comparison

ARCTIC P12 Pro PST - Powerful Premium Fan,Thermalright Assassin King 120 SE White ARGB CPU

Overview of the Products

In this comparison, we will examine the ARCTIC P12 Pro PST and the Thermalright Assassin King 120 SE White ARGB CPU air cooler. The ARCTIC P12 Pro is priced at $9.49, while the Thermalright Assassin King is considerably higher at $19.82, representing a price difference of about 109%. This stark difference sets the stage for an in-depth analysis of their features and overall value.

Design and Build Quality

The ARCTIC P12 Pro features a sleek design ideal for high airflow applications, while the Thermalright Assassin King boasts a more robust structure with a heat sink made of aluminum and five heat pipes. The ARCTIC fan is designed for efficiency, promising high static pressure that penetrates dense radiators and mesh structures. Conversely, the Thermalright cooler stands out with its ARGB lighting effects and a height of 148mm, which caters to medium-sized cases. The choice between them may depend on whether you prioritize aesthetics or performance.

Cooling Performance

The ARCTIC P12 Pro can operate at a wide speed range of 600 to 3000 RPM, adjustable via a 4-pin PWM connection. This capability allows the fan to stop completely at less than 5% PWM, ensuring quiet operation during low-demand scenarios. In contrast, the Thermalright Assassin King features a fan speed of approximately 1550 RPM, with an airflow rating of 66.17 CFM and a noise level of up to 25.6 dB(A). The ARCTIC fan's capability of reaching higher RPMs may lead to superior cooling in more demanding situations, but the Thermalright cooler offers a quieter operation while still providing effective cooling.

Noise Levels

When it comes to noise, the ARCTIC P12 Pro employs a smooth-running fluid dynamic bearing, designed to minimize noise during operation. This makes it ideal for users seeking a quiet environment. On the other hand, the Thermalright Assassin King has a maximum noise level of 25.6 dB(A), which is relatively low for a cooler of its type but does not match the quiet performance promised by the ARCTIC fan. Users who are particularly sensitive to noise may lean towards the ARCTIC P12 Pro for its quieter operation.

Installation and Compatibility

The ARCTIC P12 Pro is straightforward to install, designed to fit a variety of applications thanks to its universal fan mounting. Meanwhile, the Thermalright Assassin King provides comprehensive compatibility with both AMD and Intel sockets, including 1150, 1151, and AM4. It comes equipped with metal fasteners that facilitate a secure installation process. If you are building a system with specific CPU socket requirements, the Thermalright cooler offers more versatility due to its broader compatibility.

Brand Reputation and Sales Rank

ARCTIC is known for its high-performance cooling solutions, with the P12 Pro holding a sales rank of 12,134. This places it among popular choices in the market, indicating a solid reputation for reliability and performance. Thermalright, with over 20 years of experience in the cooling sector, also enjoys a strong reputation, though its sales rank is not specified here. Brand loyalty may play a role in your decision, depending on previous experiences with either brand.

Aesthetic Appeal

The aesthetic element is significant, especially for custom builds. The ARCTIC P12 Pro comes in a sleek black finish, which suits various setups without drawing too much attention. In contrast, the Thermalright Assassin King features striking ARGB lighting, adding a vibrant visual element to your build. If visual appeal is essential for you, the Thermalright cooler may be the more attractive option, while the ARCTIC fan excels in understated elegance.

Pricing and Value

At a price of $9.49, the ARCTIC P12 Pro is about 109% cheaper than the Thermalright Assassin King, which retails for $19.82. This significant price difference makes the ARCTIC fan an appealing choice for budget-conscious consumers looking for effective cooling solutions. However, the Thermalright cooler offers additional features such as ARGB lighting and enhanced compatibility, justifying its higher price point for users who value those aspects.

Which should you buy?

Ultimately, the decision between the ARCTIC P12 Pro and the Thermalright Assassin King comes down to your specific needs and preferences. If you prioritize cost-effectiveness and quiet performance in a straightforward fan design, the ARCTIC P12 Pro is an excellent choice. However, if you are looking for a CPU cooler with superior aesthetics, broader compatibility, and effective cooling capabilities, the Thermalright Assassin King may be worth the investment. Each product has its unique strengths, making them suitable for different types of users.