Thermalright Peerless Assassin 140 White CPU Air Cooler - High

In this review of the Peerless Assassin 140 White, the bottom line is simple: this cooler is for builders who need robust air cooling without moving to liquid solutions. It combines a twin-tower fin array, six pure copper heatpipes and dual PWM fans to move a lot of air while keeping noise reasonable, and the 158mm height fits most mid and full towers. For anyone upgrading a midrange or high-end CPU and prioritizing sustained thermal performance, this cooler delivers clear gains over single-tower designs.

Key Features

• Twin-tower design: Two symmetrical aluminium fin stacks increase surface area for heat transfer, improving sustained cooling under load.
• Six copper heatpipes: The pure copper sintered heatpipes rapidly conduct heat from the CPU base to the fins, reducing core temperatures during heavy workloads.
• AGHP 4.0 technology: The 66mm heatpipe design addresses anti-gravity effects so performance remains consistent regardless of cooler orientation.
• Dual PWM fans: A 120mm and 140mm fan combination runs up to 1500 RPM to provide high airflow with controllable speed through PWM headers.
• 158mm height: The cooler fits most mid-tower and full-tower cases while leaving room for tall memory modules and large GPUs.
• Broad socket compatibility: Mounting hardware supports current Intel and AMD platforms, including AM4, AM5, LGA 1700 and LGA 1851, for easy cross-platform use.

Who It's For

The Peerless Assassin 140 White is aimed at PC builders who want a high-capacity air cooler that competes with entry-level AIOs without the complexity of liquid. It works well for content creators, gamers and workstation users running sustained multi-threaded loads where thermal headroom matters.

Enthusiasts seeking the absolute smallest form factor or those with very limited case clearance should look elsewhere; compact SFF builds or ultra-quiet HTPCs may prefer a low-profile cooler or a custom AIO for a smaller footprint and different acoustic tradeoffs.

Pros & Cons

Pros

• Strong sustained cooling thanks to the twin-tower aluminium fins and six copper heatpipes.
• Effective dual PWM fans provide high airflow while allowing motherboard speed control.
• Good compatibility across modern Intel and AMD sockets for broad reuse.
• Height and fin layout leave room for most tall memory modules and large GPUs in compatible cases.

Cons

• The 158mm height means it will not fit very small cases or some compact mini-ITX towers.
• At higher fan speeds the unit can be audible compared with ultra-quiet single-fan solutions.

Specifications

Type	Dual-tower CPU air cooler
Heatpipes	Six pure copper sintered heatpipes
Fans	Dual PWM fans: 120x120x25mm and 140x140x27mm, 1500 RPM
Max airflow	66.17 CFM (per fan, max)
Noise level	Approx. 25.6 dB(A)
Height	158 mm
Compatibility	Intel LGA 1150/1151/1155/1156/1200/1700/1851; AMD AM4/AM5

Our Verdict

The Peerless Assassin 140 White is a well engineered air cooler that delivers near-AIO thermal performance for builders who prefer air. With six copper heatpipes, AGHP technology and dual PWM fans it handles sustained loads reliably and fits most mid and full towers, making it a practical value for gamers and creators who need dependable cooling without extra complexity.

Frequently Asked Questions

Will this cooler fit in standard mid-tower cases?
Yes, the cooler is 158 mm tall and will fit most mid-tower and full-tower cases, but check your case clearance if it is a compact model.

Does it support modern Intel and AMD sockets?
Yes, the mounting kit supports a wide range of sockets including Intel LGA 1700/1851 and AMD AM4/AM5.

Are both fans PWM controlled?
Yes, both included fans use 4-pin PWM connectors so fan speed can be managed by the motherboard.