Thermalright Peerless Assassin 140 SE Review (2026): A Spec-Based Look
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This thermalright peerless assassin 140 se review focuses on a dual-tower air cooler designed for efficient heat dissipation. The unit features six fully electroplated heat pipes and a copper base to transfer heat away from the processor. It includes two PWM fans, sized 120mm and 140mm, which operate at speeds up to 1850 RPM. The overall height is 158mm, making it compatible with a wide range of PC chassis. This configuration aims to provide strong cooling performance for various CPU models while maintaining manageable noise levels during operation.
What stands out
- Dual-tower design with six heat pipes for increased surface area
- Includes both 120mm and 140mm PWM fans for flexible airflow
- 158mm height fits most standard PC cases without interference
- SS2 mounting bracket supports multiple socket types including AM5 and LGA1700
Who it fits
Good fit for
You should consider this cooler if you need a versatile solution for modern AMD or Intel platforms. The 158mm height allows it to fit in many mid-tower cases, while the dual-fan setup helps manage heat from higher-end CPUs. The included PWM control line ensures synchronized fan speeds based on motherboard readings. It is a practical choice for builders who want strong thermal performance without requiring excessive space inside their chassis.
Who should skip it
You should look at another option if your PC case has a CPU cooler height limit below 158mm. The dual-fan design may not fit in smaller mini-ITX cases or compact mid-tower builds. Additionally, if you require extremely quiet operation under heavy loads, the maximum fan speed of 1850 RPM may generate more noise than single-fan or lower-speed alternatives. Check your case specifications carefully before purchasing.
Verdict: This cooler offers solid specifications for its price point, balancing height constraints with effective dual-fan cooling. It is a reliable choice for standard ATX builds requiring robust thermal management.
Key specs explained for you
Tower Design: Dual-Tower
This cooler uses two separate aluminum fin stacks. This structure provides more surface area for heat to escape into the air. You get better cooling performance than single-tower designs. It helps keep your CPU temperatures lower under heavy loads. This design is common in mid-range air coolers. It is a practical choice for most desktop builds.
Heat Pipes: 6
The unit includes six copper heat pipes. These pipes move heat from the copper base to the fins quickly. More pipes usually mean better heat transfer. You benefit from stable temperatures even when the CPU works hard. This count is standard for efficient air coolers. It ensures the heat spreads evenly across the fin stacks.
Cooler Height: 158mm
The total height of the cooler is 158mm. This size fits inside most standard computer cases. You do not need to worry about side panel clearance. It is taller than basic coolers but shorter than some high-end models. This height offers a good balance between cooling power and case compatibility. Check your case specifications before installing.
Fan Size: 120mm, 140mm
The package includes one 120mm fan and one 140mm fan. Larger fans can move more air at lower speeds. This setup allows for efficient cooling with less noise. You get flexibility in how you configure airflow. The 140mm fan provides higher air volume. The 120mm fan complements it for balanced dual-tower cooling.
Design and Build Details
The listing describes a dual-tower structure made from all-aluminum fins. This material choice provides a large surface area for heat dissipation. The base is finely carved copper, which helps transfer heat from the CPU to the six fully electroplated heat pipes. The electroplating is intended to prevent oxidation over time. This combination of materials aims to maintain efficient thermal transfer throughout the product's life.
Size is a key factor here. The overall height is 158mm. This dimension allows it to fit inside more chassis cases than taller units. The fans are 120mm and 140mm, with a thickness of 27mm or 28mm. The 140mm fan can spin up to 1850 RPM, while the 120mm fan reaches 1500 RPM. You can control both fans via PWM signals from your motherboard. The included 1-to-2 wire line ensures both fans adjust speed synchronously based on temperature.
Installation relies on the SS2 buckle, which supports multiple CPU sockets including AM5, AM4, LGA1851, and LGA1700. The design allows for easy installation and removal. You do not need manual adjustments to change fan speeds. The layout is straightforward, with hooks fixing the fans to the twin tower radiator. This build focuses on practical compatibility and straightforward thermal management without complex controls.
Setup and Everyday Use Guide
Installing this cooler begins with the included SS2 mounting bracket. The listing states this bracket is compatible with multiple CPU specifications. You can mount it on AM4, AM5, LGA 1851, LGA 1200, LGA 1150, and LGA 1151 sockets. The design allows for easy installation and removal, which simplifies future upgrades or maintenance. The cooler stands 158mm tall. This height is designed to fit within more chassis cases, reducing clearance issues with large RAM modules or side panels. You must ensure your case supports this dimension before purchase. The unit comes with two fans: one 120mm and one 140mm. These fans measure 28mm and 27mm in thickness respectively. They connect via 4-pin PWM interfaces. A 1-to-2-wire PWM control line is included. This cable allows both fans to synchronize their speed with your motherboard. You do not need to adjust speeds manually. The fans adjust automatically based on temperature. The 120mm fan reaches up to 1850 RPM with 88.89 CFM airflow. The 140mm fan reaches 1500 RPM with 77.8 CFM airflow. Operating noise is rated at 29.5 dB and 25.6 dB. This setup provides a straightforward path to efficient heat dissipation without complex wiring or software adjustments.
Before You Buy This Cooler
Before you buy this cooler, verify your case supports a 158mm height. This dimension ensures the unit fits without blocking RAM or side panels. The package includes a 120mm and a 140mm fan, so you need adequate space for both. You must check your motherboard headers, as the cooler uses a 1-to-2 PWM cable to sync both fans. This simplifies wiring but requires a compatible header. The SS2 bracket covers AM4, AM5, LGA1851, LGA1700, and LGA1200. Confirm your socket is listed. Dust accumulation on the aluminum fins can reduce efficiency over time. You should clean the fins periodically with compressed air to maintain performance. This dual-tower design sits among other high-performance options in our guide. It offers a balance of size and cooling capacity. Unlike single-tower models, it handles higher thermal loads. However, it requires more internal case space. Consider your chassis dimensions carefully before purchasing. This guide helps you compare it against other air coolers based on published specifications.
Check before you buy
- Verify your case supports 158mm cooler height.
- Confirm your CPU socket is AM4, AM5, or LGA1700.
- Ensure you have space for both 120mm and 140mm fans.
- Check motherboard has a 4-pin PWM header for control.
The product at a glance
Thermalright Peerless Assassin 140 SE
Best for: Standard mid-tower desktop builds
- Socket Compatibility
- AM5, AM4, LGA1851, LGA1700, LGA1200
- Cooler Height
- 158mm
- Heat Pipes
- 6
- Tower Design
- Dual-Tower
- Fan Size
- 120mm, 140mm
- Fan Speed
- 1850 RPM, 1500 RPM
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This dual-tower air cooler uses six heat pipes and two fans to manage CPU heat. It includes a 120mm fan and a 140mm fan, both running at up to 1850 RPM. The unit stands 158mm tall, fitting most cases. You get broad socket support for modern platforms. It suits users who need reliable cooling without excessive noise.
Pros
- Dual-tower design with six heat pipes
- Includes 120mm and 140mm PWM fans
- 158mm height fits most chassis
- Supports AM5, AM4, LGA1851, and LGA1700
Cons
- 158mm height may block tall RAM
- Noise level reaches 29.5 dB at max speed
- Only supports aluminum fin material
Good fit if
- You need broad socket compatibility
- You want a dual-fan setup
- You have a mid-tower case
Skip if
- You have very tall RAM modules
- You need silent operation under load
- You have a small form factor case
Verdict: Thermalright Peerless Assassin 140 SE offers solid cooling performance for standard desktop builds. It fits users who prioritize heat pipe count and fan size over extreme silence.
Specifications side by side
| Spec | Thermalright Peerless Assassin 140 SE |
|---|---|
| Socket Compatibility | AM5, AM4, LGA1851, LGA1700, LGA1200 |
| Cooler Height | 158mm |
| Heat Pipes | 6 |
| Tower Design | Dual-Tower |
| Fan Size | 120mm, 140mm |
| Fan Speed | 1850 RPM, 1500 RPM |
| Color | PA140SE |
| Model | PA140SE-D2 |
Frequently asked questions
Which CPU sockets does the Thermalright Peerless Assassin 140 SE support?
This cooler supports AM4, AM5, LGA 1851, LGA 1200, LGA 1150, and LGA 1151 sockets. You can use it with most modern AMD and Intel processors. The included SS2 mounting bracket helps you attach it securely to these platforms. Always check your specific motherboard layout before installation.
How many heat pipes are in the Peerless Assassin 140 SE?
The unit contains six heat pipes. These pipes help transfer heat from the copper base to the aluminum fins. This design aids in cooling your processor efficiently. The heat pipes are fully electroplated to improve durability and thermal conductivity during operation.
What type of fans are included with this cooler?
The package includes two PWM fans. One fan is 120mm and the other is 140mm. These fans move air through the dual-tower fin stack. You can control their speed via your motherboard to balance cooling performance and noise levels.
Is the Peerless Assassin 140 SE suitable for mid-tower cases?
Yes, it is designed for standard mid-tower desktop builds. You must ensure your case supports a cooler height of 158mm. This dimension allows the dual-tower design to fit without blocking RAM or side panels. Check your case specifications before purchasing.
What is the main material used for the fins?
The fins are made from all-aluminum material. This choice provides a large surface area for heat dissipation. Aluminum is lightweight and conducts heat well. The structure helps keep your CPU temperatures lower under load by moving heat away from the base.
Does this cooler use a copper base?
Yes, the base is finely carved copper. Copper transfers heat from the CPU to the six heat pipes effectively. This material choice helps in efficient heat dissipation. The combination of a copper base and aluminum fins creates a balanced cooling solution for your processor.