# TLDR Review: Thermalright Peerless Assassin 120 SE CPU Cooler

*Published: 2026-01-14 | Updated: 2026-01-14 | Source: https://shopsavvy.com/reviews-tldr/thermalright-peerless-assassin-120-se-cpu-cooler*

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## Product: Thermalright Peerless Assassin 120 SE CPU Cooler
**Brand:** Thermalright

## Pros
- Significantly reduces CPU temperatures compared to stock and older coolers, even under heavy load.
- Operates very quietly, with noise levels peaking around 25.6 dBA.
- Easy and straightforward installation process with included mounting hardware and thermal paste.
- Attractive ARGB lighting enhances case aesthetics without sacrificing cooling performance.
- Premium build quality featuring a dual-tower aluminium heatsink and smooth, silent dual 120mm PWM fans.
- Compatible with a wide range of CPU sockets, including AMD AM4/AM5 and Intel LGA 1700/1150/1151/1200.
- Efficient heat dissipation with six heat pipes and a unique fan setup that pushes hot air effectively towards the rear exhaust.
- Good clearance around RAM slots and GPU, with versatile fan placement options.
- Maintains consistent, safe temperatures during extended use, including high-performance CPUs like the Ryzen 9 9900X and Ryzen 7 5800X.
- Offers excellent performance-to-price value, outperforming many low-profile and stock coolers.

## Cons
- Large size (~155mm tall) may cause clearance issues with taller memory modules or smaller cases.
- Not ideal for extreme overclocking or CPUs with TDP above ~300W.
- Installation may require patience, especially with thermal paste application and multiple screw turns before contact.
- Might be less beginner-friendly due to size and mounting complexity.
- Some users note potential interference with larger RAM sticks unless a fan is added to the backside of the heatsink.

## Bottom Line

The Thermalright Peerless Assassin 120 SE is a quiet, powerful dual-tower air cooler that provides exceptional cooling performance and value for mainstream to high-end CPUs in mid to full tower cases. It's especially well-suited for users who want strong thermal management without breaking the bank or dealing with noisy fans. However, its large size means you should double-check your case and RAM clearance before buying, and if you plan extreme overclocking or have a very high-TDP CPU, you might want to consider even beefier solutions. Overall, for most users looking for reliable, silent cooling with stunning ARGB flair, this cooler is a solid choice.

## Pros vs Cons at a Glance

| Pros | Cons |
|------|------|
| Significantly reduces CPU temperatures compared to stock and older coolers, even under heavy load. | Large size (~155mm tall) may cause clearance issues with taller memory modules or smaller cases. |
| Operates very quietly, with noise levels peaking around 25.6 dBA. | Not ideal for extreme overclocking or CPUs with TDP above ~300W. |
| Easy and straightforward installation process with included mounting hardware and thermal paste. | Installation may require patience, especially with thermal paste application and multiple screw turns before contact. |
| Attractive ARGB lighting enhances case aesthetics without sacrificing cooling performance. | Might be less beginner-friendly due to size and mounting complexity. |
| Premium build quality featuring a dual-tower aluminium heatsink and smooth, silent dual 120mm PWM fans. | Some users note potential interference with larger RAM sticks unless a fan is added to the backside of the heatsink. |
| Compatible with a wide range of CPU sockets, including AMD AM4/AM5 and Intel LGA 1700/1150/1151/1200. |  |
| Efficient heat dissipation with six heat pipes and a unique fan setup that pushes hot air effectively towards the rear exhaust. |  |
| Good clearance around RAM slots and GPU, with versatile fan placement options. |  |
| Maintains consistent, safe temperatures during extended use, including high-performance CPUs like the Ryzen 9 9900X and Ryzen 7 5800X. |  |
| Offers excellent performance-to-price value, outperforming many low-profile and stock coolers. |  |

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*About this review: We pulled together findings from professional and user reviews, and cross-referenced them with ShopSavvy's pricing data from thousands of retailers to give you the short version.*