Thermalright Peerless Assassin 120H-A Dark

● HIGHLY RATED
Site Score
4.4 / 5.0
Buyer Guidance: An aggressive dual-tower air cooler delivering substantial thermal headroom for high-TDP processors, though users should establish custom fan curves to control high-RPM acoustics.
Mizex Audit Breakdown
Engineering & Core Performance (30%) 4.4 / 5.0
Build Quality & Physical Design (20%) 4.3 / 5.0
Thermal, Power & Acoustics (20%) 4.1 / 5.0
Reliability & Stability (20%) 4.6 / 5.0
Buyer Value (10%) 4.7 / 5.0
Score Rationale
The composite score of 4.4 is anchored by robust Engineering & Architecture (4.4) featuring a proven dual-tower heatsink layout, six 6mm anti-gravity heatpipes, and standardized PWM integration free of software overhead. Build quality (4.3) is underscored by resilient aluminum fin tolerances, an integrated matte black coating, and a dependable spring-loaded mounting bridge. Thermal management and acoustic profile (4.1) benefits from powerful 2.95 mmH2O static pressure and 85.35 CFM airflow, balanced against an elevated 33.3 dBA ceiling at maximum 2400 RPM operation. Reliability (4.6) is exceptional due to the zero-leak risk of solid-state heatsink construction and durable fan motor bearings backed by a 3-year warranty. Buyer value (4.7) remains outstanding with standard modular 120mm fan replacement options and extensive multi-socket hardware retention across modern Intel and AMD platforms.
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Overview

The Thermalright Peerless Assassin 120H-A Dark is a high-performance dual-tower CPU air cooler engineered to expand the thermal dissipation ceiling of Thermalright’s heatsink architecture through an aggressive airflow configuration and an all-black finish. Structurally, the cooler incorporates two dense aluminum fin stacks interconnected by six 6mm copper heatpipes utilizing anti-gravity heatpipe technology to preserve fluid capillary circulation regardless of horizontal or vertical motherboard orientation. The exterior is treated with a uniform matte black coating across the fin array and topped with protective black cover plates, maintaining a total height of 159 mm to fit within standard mid-tower chassis clearances.

Thermal management is anchored by two upgraded TL-N12-R9 V2 120mm PWM fans operating up to 2400 RPM, producing a rated 85.35 CFM of airflow and 2.95 mmH2O of static pressure. While this elevated fan speed provides the thermal density required to control demanding multi-core desktop processors, full-tilt operation reaches a manufacturer-rated acoustic ceiling of 33.3 dBA, necessitating motherboard PWM curve modulation to mitigate high-speed air turbulence during sustained loads. As an analog electro-mechanical cooling assembly, the device operates without proprietary companion software or microcode dependencies, relying exclusively on standardized 4-pin PWM headers for BIOS-level fan curve regulation. As a newly announced revision, full thermal efficiency mapping and internal acoustic harmonic evaluations remain pending comprehensive retail physical teardown.

Technical Specifications

Cooler Type Dual-Tower CPU Air Cooler
Heatsink Material Aluminum Fins with Copper Heatpipes
Heatpipe Configuration 6 x 6mm Anti-Gravity Heatpipes (AGHP)
Dimensions With Fans 125 mm x 135 mm x 159 mm
Heatsink Dimensions 125 mm x 110 mm x 159 mm
Bundled Fans 2 x Thermalright TL-N12-R9 V2 (120mm)
Fan Dimensions 120 mm x 120 mm x 25 mm
Maximum Fan Speed 2400 RPM ±10%
Maximum Airflow 85.35 CFM
Maximum Static Pressure 2.95 mmH2O
Acoustic Noise Rating 33.3 dBA (Max)
Power Connector 4-Pin PWM
Socket Compatibility Intel LGA115X/1200/1700/1851, AMD AM4/AM5
Exterior Finish All-Black Anodized / Matte Coated
Manufacturer Warranty 3 Years
✔ Pros
  • Six 6mm anti-gravity heatpipes maintain efficient heat transfer across all chassis orientations
  • Upgraded 2400 RPM TL-N12-R9 V2 fans deliver substantial airflow (85.35 CFM) and static pressure (2.95 mmH2O)
  • Broad socket compatibility supporting current Intel LGA1851/1700 and AMD AM5 motherboards
  • Compact 159 mm height profile fits within standard mid-tower chassis enclosures
✖ Cons
  • Peak 33.3 dBA acoustic noise floor at 2400 RPM requires custom PWM curve calibration
  • Front fan installation may require vertical offset over tall high-profile memory modules
  • Complete laboratory calorimeter thermal resistance metrics pending retail physical teardown
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