Thermalright Peerless Assassin 120 Black Review (2026): A Spec-Based Look
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This thermalright peerless assassin 120 black review focuses on a dual-tower air cooler designed for Intel and AMD platforms. It features six pure copper heat pipes and two 120mm PWM fans. The black anodized finish covers twin towers with an offset layout for first-slot compatibility. With a maximum fan speed of 1550 RPM and airflow up to 66.17 CFM, it targets efficient heat dissipation. The cooler weighs 1.02 kg and stands 157 mm tall. You get specific mounting hardware for modern sockets. This spec-based look explains how these components work together for cooling performance.
What stands out
- Six 6mm heat pipes use AGHP technology to prevent heat pipe inversion.
- Dual 120x120x25mm PWM fans provide up to 66.17 CFM airflow.
- Offset asymmetric design allows clearance for first-slot graphics cards.
- Supports Intel LGA 1700/1851 and AMD AM4/AM5 sockets.
- Black nanoscale paint finish on the aluminum twin-tower heatsink.
Who it fits
Good fit for
You will like this cooler if you need strong cooling for Intel LGA 1700/1851 or AMD AM4/AM5 CPUs. The dual-tower design and six heat pipes handle high heat loads. The offset layout fits cases where the first PCIe slot is occupied. If you prefer a black aesthetic and silent operation under 25.6 dB, this fits your build. It suits mid-tower cases with RAM clearance above 157 mm.
Who should skip it
You should skip this if your case height is under 157 mm. The dual-tower design blocks tall RAM modules in some slots. It is not for small form factor builds with limited airflow. If you need RGB lighting, this black model lacks LEDs. Users preferring single-fan compact coolers for low-TDP chips may find this too large and heavy at 1.02 kg.
Verdict: This dual-tower air cooler offers robust cooling specs for modern sockets. It fits well in standard mid-tower cases with proper RAM clearance.
Key specs explained
Dual-Tower design
This cooler uses two separate aluminum heatsink stacks. You get more surface area for heat dissipation compared to single-tower models. The offset layout allows the unit to clear the first graphics card slot on most motherboards. This design suits high-performance builds where space around the GPU is tight but you need maximum cooling capacity.
6 heat pipes
The unit includes six pure copper heat pipes using AGHP technology. This technique helps move heat away from the base even when the cooler is mounted horizontally. More pipes generally mean faster heat transfer from the CPU to the fins. You benefit from consistent performance across different mounting orientations and socket types.
120mm PWM fans
The cooler ships with two 120mm fans that support Pulse Width Modulation. PWM allows your motherboard to adjust fan speed automatically based on temperature. These fans provide 66.17 CFM of airflow at 1550 RPM. You get effective cooling with noise levels kept under 25.6 dB(A) during typical operation.
157mm cooler height
The total height of the cooler is 157mm. You must check your case specifications to ensure it fits without blocking side panels or RAM. This height is common for high-end air coolers. It allows for larger fins and better airflow, but it requires adequate clearance inside your computer case.
Build materials and layout
The cooler uses two aluminum towers with a black nanoscale paint finish. The listing states the effective heat dissipation area is 9600cm². This large surface area helps move heat away from the base. The base itself is pure copper. Six 6mm heat pipes connect the base to the fins. These pipes use AGHP technology to prevent heat loss in vertical or horizontal positions. This design choice ensures consistent cooling regardless of how you mount the unit.
The unit measures 125mm in length, 135mm in width, and 157mm in height. It weighs 1.02kg. The offset tower layout allows installation on the first graphics card slot. This clears space for large GPU shrouds. The cooler includes metal fasteners for both Intel and AMD platforms. You get specific mounting plates for sockets like LGA1700, LGA1851, AM4, and AM5. This ensures a secure fit across different motherboard types.
Two TL-C12B PWM fans are included. Each fan is 120mm by 120mm by 25mm. They run at 1550 RPM with a maximum airflow of 66.17 CFM. Noise levels stay at or below 25.6 dB. The 4-pin connector lets your motherboard control speed. This setup balances cooling performance with quiet operation. The black finish matches most modern cases. The dual-tower design provides strong airflow for high-end CPUs.
Setup And Everyday Use
Installation involves using the included metal fasteners for both Intel and AMD platforms. The listing provides specific mounting plates for various sockets. You can use this cooler on Intel LGA1150, 1151, 1155, 1156, 1200, 1700, 1851, 2011, and 2066. AMD support covers AM4 and AM5 sockets. The offset asymmetric layout is designed to clear the first graphics card slot. This helps you install the cooler without blocking your GPU. The total height is 157mm. You must check your case clearance before assembly. The unit weighs 1.02kg. This mass helps stabilize the dual towers. The two 120mm PWM fans connect via a 4-pin header. They run at 12V. Maximum speed is 1550rpm. This speed generates 66.17CFM of airflow. The noise level stays at or below 25.6dB(A). Daily use relies on the AGHP technique. This method uses six 6mm pure copper heat pipes. It addresses gravity effects in vertical or horizontal orientations. The sintered heat pipes improve heat transfer to the aluminum fins. The black nanoscale paint covers the twin towers. This finish does not change cooling performance but matches dark builds. The cooler maintains consistent temperatures under load. The dual fan setup ensures steady airflow across the heatsink. You get reliable thermal management for your CPU. The system remains quiet during light tasks. Heavy workloads are handled by the large surface area. The 9600cm² dissipation area moves heat efficiently. This setup provides stable operation for gaming or rendering.
Before you buy this cooler
You need to check case clearance before buying. The cooler stands 157mm tall. Your case must accommodate this height. RAM height can also be an issue with dual towers. This unit fits Intel LGA1700, 1851, and AMD AM5 sockets. It also supports older platforms like LGA115x and AM4. You should verify your motherboard socket matches the included fasteners. The fans are 120mm PWM models. They connect via a 4-pin header on your motherboard. You will need to ensure you have free headers for both fans. Upkeep is simple. Dust the fins periodically with compressed air. This model sits among top-tier air coolers. It offers strong cooling for its price range. It suits users who prioritize performance over RGB lighting. The black finish helps it blend into dark builds. You get solid heat pipe technology and dual fans. This makes it a practical choice for most desktops.
Check before you buy
- Verify your case supports 157mm cooler height.
- Check RAM clearance near the dual towers.
- Confirm your motherboard socket is supported.
- Ensure you have two free 4-pin fan headers.
The product at a glance
Thermalright Peerless Assassin 120 Black Dual Tower
Best for: Standard ATX cases with modern Intel or AMD CPUs
- Socket Compatibility
- LGA115X/1851/1700/2011, AM4/AM5
- Cooler Height
- 157mm
- Heat Pipes
- 6
- Tower Design
- Dual-Tower
- Fan Size
- 120mm
- Fan Speed
- 1550rpm±10%
View on Amazon: Thermalright Peerless Assassin 120 Black Dual Tower Affiliate link
This dual-tower air cooler uses six 6mm pure copper heat pipes and a pure copper base for efficient heat transfer. It includes two 120mm PWM fans that reach 1550 RPM with airflow up to 66.17 CFM. The 157mm height fits most cases. It supports Intel LGA 1700/1851 and AMD AM4/AM5 sockets. You get strong cooling performance for standard desktop builds.
Pros
- Dual-tower design with 9600cm² effective heat dissipation area
- Six 6mm pure copper heat pipes with AGHP technology
- Dual 120mm PWM fans providing up to 66.17 CFM airflow
- Supports modern Intel LGA 1700/1851 and AMD AM4/AM5 sockets
Cons
- 157mm height may block tall RAM sticks in small cases
- Noise level reaches up to 25.6 dB(A) at max speed
- Fans are limited to 1550 RPM maximum speed
Good fit if
- You need reliable cooling for high-end Intel or AMD CPUs
- You have a mid-tower case with at least 160mm clearance
- You prefer a dual-tower design for better heat dissipation
Skip if
- You are building in a mini-ITX case with low clearance
- You require silent operation below 20 dB(A)
- You need support for older Intel sockets like LGA 1150
Verdict: Thermalright Peerless Assassin 120 Black delivers solid dual-tower cooling with six heat pipes and efficient fans. It is a practical fit for users with standard ATX cases and modern LGA 1700 or AM5 processors.
Specifications side by side
| Spec | Thermalright Peerless Assassin 120 Black Dual Tower |
|---|---|
| Socket Compatibility | LGA115X/1851/1700/2011, AM4/AM5 |
| Cooler Height | 157mm |
| Heat Pipes | 6 |
| Tower Design | Dual-Tower |
| Fan Size | 120mm |
| Fan Speed | 1550rpm±10% |
| Color | Black |
| Dimensions | 2.43 × 2.09 × 1.94 inches |
| Model | PA120SE BLACK |
Frequently asked questions
Does the Thermalright Peerless Assassin 120 Black fit AM5 sockets?
Yes, this cooler supports AMD AM5 processors. It also works with Intel LGA 1851 sockets. You get broad compatibility for modern platforms. The listing confirms support for these specific socket types, ensuring you can mount it on recent CPU generations without issue.
How many heat pipes does this cooler have?
The unit features six heat pipes. These pipes help transfer heat from the base to the aluminum fins efficiently. This count provides a solid thermal transfer path. The six pipes are a key part of its dual-tower design for effective cooling.
Is the Thermalright PA120 Black compatible with LGA 1700?
The data does not explicitly list LGA 1700 in the attributes, only LGA 1851. However, the brand typically supports older Intel sockets. You should verify specific mounting hardware inclusion for LGA 1700 on the product page to ensure proper fitment for your motherboard.
What is the height of the Thermalright Peerless Assassin 120 Black?
The cooler stands 1.94 inches tall. This is approximately 49.3 millimeters. You must check your case clearance against this height. The compact vertical profile allows it to fit in many standard ATX cases without blocking RAM slots.
Does this model come in a black color option?
Yes, the specific model listed is the PA120SE BLACK. It features a black anodized finish on the towers. This color matches modern PC builds that prefer a dark aesthetic. The black paint covers the aluminum fins and heat pipes.
Can this cooler clear the first PCIe slot?
Yes, the offset layout is designed for first-slot compatibility. The dual-tower design shifts the fan position slightly. This allows the cooler to sit higher, avoiding interference with the primary graphics card slot on most motherboards.