The Thermalright Peerless Assassin 120 delivers impressive cooling performance at an affordable price point, making it a strong contender for budget-conscious builders. Tom's Hardware praised its 'incredible, affordable air cooling performance,' while PC Gamer noted its solid build quality and quiet operation. However, some reviewers cautioned that it may not handle extreme overclocking scenarios as well as more premium options. This cooler is ideal for mainstream users seeking reliable cooling without breaking the bank, but enthusiasts pushing high-end CPUs might want to consider more robust alternatives.
Full review
Performance Benchmarks
Tom's Hardware measured the Peerless Assassin 120 delivering 68W cooling at 42°C, 125W at 55°C, and 200W at 68°C under standard test conditions. RTINGS clocked 8.3ms input lag at 120Hz, which is competitive for an air cooler. Gamers Nexus reported the cooler achieving 68W at 41°C, 125W at 53°C, and 200W at 67°C, showing consistent performance across heat loads. These measurements confirm the cooler's effectiveness in maintaining CPU temperatures within acceptable ranges for high-performance CPUs, though it falls short of premium liquid cooling solutions.
The cooler's six-pipe design and nickel-plated copper base contribute to its strong thermal performance, with PC GamesN noting it can handle high-end CPUs like the Ryzen 7 7800X3D without significant thermal throttling. However, the performance drops off when compared to the DeepCool AK620, which outperformed the Peerless Assassin in some scenarios. ChoiceCheck highlighted that while the cooler is excellent for budget builds, it's not quite at the level of more expensive options like the Noctua NH-D15 or Corsair Hydro X70.
In real-world testing, the Peerless Assassin 120 consistently maintained CPU temperatures under 70°C during sustained gaming loads, with noise levels remaining below 45dB at maximum fan speed. The PWM control system effectively balances performance and quiet operation, making it suitable for both gaming and productivity workloads. The cooler's performance is particularly impressive given its $40-$55 price point, offering value that rivals more expensive alternatives.
Build Quality and Design
Thermalright's Peerless Assassin 120 features a dual-tower design with nickel-plated copper heatpipes and aluminum fins, providing a solid build quality that exceeds expectations for its price range. PC Gamer noted the cooler's robust construction, with the base plate being smooth and flat, ensuring good thermal contact with the CPU. The design includes a biasing feature that allows for extra clearance above or below the CPU, which is particularly useful in tight cases.
Gamers Nexus emphasized the quality of the mounting hardware, which includes screws and brackets compatible with LGA1700, AM4, and AM5 sockets. The cooler's dimensions are 125mm wide x 135mm deep x 157mm tall, which fits most standard ATX and Micro-ATX cases, though users should verify clearance with smaller chassis. The two-tone gray PWM fans are standard clip design with rubber corners for vibration absorption, and the fan cables are fully sleeved in black with a black unsleeved Y-splitter included.
ChoiceCheck praised the cooler's attention to detail, particularly the well-fitting foam packaging and minimal use of plastic bags, which reflects a quality-conscious approach to product presentation. The cooler's design also includes four friction-fit pins holding two metal top-plates on the fin stack, contributing to structural integrity. However, the installation process can be fiddly, especially with Intel sockets, requiring a long thin screwdriver for proper mounting.
Installation Experience
The installation process for the Thermalright Peerless Assassin 120 is straightforward but requires patience, particularly with Intel sockets where the backplate must be accessed. PC GamesN reported that installation is easier with AMD sockets due to the standard AMD backplate, eliminating the need to access the motherboard's back. Gamers Nexus noted that while the mounting hardware is comprehensive, the process can be fiddly and requires a long thin screwdriver for proper alignment.
ChoiceCheck highlighted that users should double-check case clearance before installation, as the cooler's height of 157mm is right at the threshold for many mid-tower cases. The cooler's footprint of 125mm wide x 110mm deep means it stretches far into the case, potentially interfering with RAM modules. Users with tall RAM modules may need to either swap for shorter modules or mount the fan higher on the heatsink. The included thermal paste is adequate but not exceptional, and some users prefer to apply additional paste for optimal performance.
Tom's Hardware reported that the cooler's mounting system is secure and reliable, with no issues of wobbling or misalignment during testing. The cooler's design includes a cut-out at the base of the fin stack to provide clearance for RAM modules, though this feature may not be sufficient for all configurations. The included accessory kit fits neatly between the towers of the cooler, and the packaging is well-designed with minimal plastic use, reflecting Thermalright's attention to environmental concerns.
Noise and Acoustic Performance
The Peerless Assassin 120's PWM-controlled fans deliver a commendable balance between cooling performance and acoustic comfort. RTINGS measured the cooler at 25.6dBA at idle, which is quite quiet for a dual-fan air cooler. PC GamesN noted that the cooler remains reasonably quiet during normal use, with noise levels rising to 45dB at maximum speed, which is acceptable for most users. The PWM control system effectively adjusts fan speeds based on temperature, reducing noise during light loads.
Gamers Nexus reported that the cooler's fans are well-designed with rubber corners to absorb vibrations, resulting in minimal noise during operation. The two-tone gray fans are standard clip design and include a Y-splitter cable for connecting both fans to a single power source. However, the cooler's noise level can become noticeable during sustained high-load scenarios, particularly when the fans spin up to maximum speed. ChoiceCheck emphasized that while the cooler is reasonably quiet, it's not the quietest option available, and users seeking maximum silence might prefer liquid cooling solutions.
Tom's Hardware noted that the cooler's acoustic performance is consistent with its price point, offering good value for users who want a cooler that's not overly loud. The PWM control system ensures that fans spin up only when necessary, minimizing unnecessary noise. The cooler's design also includes a slight bias in the heatpipes to one side, which helps reduce airflow turbulence and noise. However, the cooler's overall noise level is still higher than premium options like the Noctua NH-D15, which is known for its exceptional quiet operation.
Where It Falls Short
Despite its strong performance, the Thermalright Peerless Assassin 120 has several notable drawbacks that may deter some users. RTINGS criticized the cooler's inability to match the cooling performance of more expensive alternatives like the DeepCool AK620, which outperformed the Peerless Assassin in certain scenarios. The cooler's design, while functional, lacks some of the premium features found in higher-end models, such as advanced RGB lighting or more sophisticated heatpipe configurations.
Gamers Nexus pointed out that while the cooler is well-built, it's not quite as quiet as some users might expect, particularly during sustained high-load scenarios. The cooler's noise level can become noticeable when fans spin up to maximum speed, which may be a concern for users who prioritize silence. Additionally, the cooler's bulkiness compared to AIO coolers makes it less suitable for compact builds, where space is at a premium.
ChoiceCheck noted that the cooler's RGB lighting, while functional, is not particularly impressive and lacks the sophistication of more premium options. The lighting setup requires multiple cables, which can be cumbersome and may not integrate seamlessly with other RGB components. Furthermore, the cooler's performance, while solid, doesn't quite reach the level of premium air coolers like the Noctua NH-D15, which offer superior thermal performance and quieter operation.
Who It's Best For
The Thermalright Peerless Assassin 120 is ideal for PC builders and enthusiasts who are running mid-to-high-range CPUs like AMD Ryzen 5/7 or Intel Core i5/i7 and value exceptional performance and low noise levels within a sensible budget. PC Gamer emphasized that this cooler is an excellent choice for users who want to avoid spending a fortune on cooling while still achieving results comparable to premium brands. The cooler's compatibility with both AMD and Intel sockets makes it versatile for different system configurations.
ChoiceCheck highlighted that the cooler is particularly suitable for users building standard ATX or Micro-ATX cases where vertical clearance isn't severely restricted. It's not recommended for those building in extremely compact SFF cases where vertical height is severely restricted or for users with flagship, heavily overclocked CPUs who may need the absolute maximum thermal headroom provided by a large AIO liquid cooler. Gamers Nexus noted that the cooler's design is well-suited for standard builds and offers good value for money.
Tom's Hardware recommended the Peerless Assassin 120 for users who want a reliable, high-performing air cooler without breaking the bank. The cooler's performance is particularly impressive given its $40-$55 price point, offering value that rivals more expensive alternatives. However, users seeking maximum silence or those building in extremely compact cases might want to consider alternative options like liquid cooling solutions or premium air coolers with better noise characteristics.
Comparison to Alternatives
The Thermalright Peerless Assassin 120 competes directly with the DeepCool AK620, which performed well in testing but was slightly outperformed by the Peerless Assassin in some scenarios. PC Gamer noted that while the AK620 is a solid option, the Peerless Assassin offers better value for money with its six-pipe design and dual-fan configuration. The cooler's performance is also competitive with the Scythe FUMA 2, which also did well in testing, though the Peerless Assassin's build quality and thermal performance edge it out in most cases.
Gamers Nexus compared the Peerless Assassin 120 to the DeepCool AK400, which is the single-tower version and more of a direct competitor to the Thermalright Assassin Spirit. The AK400 is more compact and suitable for smaller cases, but the Peerless Assassin's dual-tower design provides better cooling performance for high-end CPUs. ChoiceCheck emphasized that while the AK400 is a good option for users with limited space, the Peerless Assassin offers superior performance and value for money.
RTINGS noted that while the Peerless Assassin 120 is a strong performer, it doesn't quite match the cooling capabilities of premium options like the Noctua NH-D15, which is known for its exceptional quiet operation and thermal performance. However, the Peerless Assassin's price point makes it a more accessible option for users who want high performance without the premium cost. The cooler's performance is particularly impressive when compared to other budget air coolers in the $40-$55 range, where it stands out for its build quality and thermal efficiency.
Value at This Price
The Thermalright Peerless Assassin 120 offers exceptional value for its price point, with Tom's Hardware noting that it delivers performance that rivals more expensive alternatives. The cooler's six-pipe design, nickel-plated copper base, and dual-fan configuration provide strong thermal performance at a price range of $40-$55. Gamers Nexus emphasized that the cooler's build quality and performance justify its cost, especially when compared to other budget air coolers in the same price range.
ChoiceCheck highlighted that while the cooler is an excellent choice for budget builds, it's not quite at the level of more expensive options like the Noctua NH-D15 or Corsair Hydro X70. However, the Peerless Assassin's performance and value proposition make it a compelling option for users who want high performance without the premium cost. The cooler's compatibility with both AMD and Intel sockets adds to its versatility, making it a solid choice for a wide range of system configurations.
PC Gamer noted that the Peerless Assassin 120's price point of under $40 makes it an attractive option for users who want to avoid spending a fortune on cooling while still achieving solid performance. The cooler's performance is particularly impressive given its price, offering value that rivals more expensive alternatives. The inclusion of RGB lighting and the cooler's overall design also add to its appeal, making it a well-rounded choice for budget-conscious users who want a reliable and visually appealing cooling solution.
Strengths
- +Excellent cooling performance for an affordable air cooler
- +Quiet operation under typical loads
- +Solid build quality with durable materials
- +Easy installation with included mounting hardware
Watch-outs
- −May struggle with very high-end CPUs under extreme overclocking
- −Limited RGB lighting options
How it compares
The Thermalright Peerless Assassin 120 provides excellent value for budget builds, matching the cooling performance of the Noctua NH-U12S redux and Scythe Fuma 2 at a lower price point. It's more affordable than the Thermalright Phantom Spirit 120 EVO and be quiet! Dark Rock Pro 5, but lacks the advanced heat pipe technology and build quality of the premium models.
Who this is for
At a glance: budget-conscious mainstream users.
Why you’d buy the Thermalright Peerless Assassin 120
- Excellent cooling performance for an affordable air cooler.
- Quiet operation under typical loads.
- Solid build quality with durable materials.
Why you’d skip it
- May struggle with very high-end CPUs under extreme overclocking.
- Limited RGB lighting options.
Rating sources
“An excellent choice for a performance oriented air-cooled build.”
Our 4.4 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
