DeepCool ASSASSIN III CPU Air Cooler - HighPerformance 280W TDP

Our review of the DeepCool ASSASSIN III finds it best suited to gamers and PC builders who want air cooling that rivals AIOs for raw thermal performance. With seven 6mm nickel plated copper heatpipes and a seamless copper base, the Assassin III is built to move heat quickly from an overclocked CPU, and the pair of TF140S 140mm fans delivers strong airflow while keeping noise modest. This review focuses on real use cases, noise and cooling tradeoffs, and why the Assassin III is a top pick for systems that need up to 280W TDP cooling without switching to liquid.

Key Features

• Seven heatpipes: Seven 6mm nickel plated copper heatpipes provide extensive contact area and fast heat transfer for sustained high-load cooling.
• Dual-tower design: The dual-tower heatsink increases fin surface for better dissipation, making it comparable to many 240mm AIOs in thermal performance.
• 140mm TF140S fans: Two 140mm patented two-layer fans push up to 90.37 CFM at a maximum 1400 RPM to clear heat from the fins quickly.
• 280W TDP rating: Rated for 280W TDP, it is engineered to handle overclocked CPUs in compact or full-size builds without liquid cooling.
• Low noise operation: Noise stays under 29.5 dB(A) at full load, and using the included LSP accessory can reduce audible noise further.
• Broad socket support: Compatible with modern AMD AM4/AM5 and a wide range of Intel sockets including LGA 1700 and 1200 series for broad motherboard support.

Who It's For

The Assassin III is aimed at gaming enthusiasts, overclockers, and PC builders who want near-AIO cooling performance from an air solution and need support for high TDP CPUs. It is especially useful for users who prefer the simplicity and reliability of air cooling and want strong sustained cooling without pump maintenance.

It is less suitable for extremely compact SFF cases with limited clearance or for users who prioritize the absolute quietest passive setups; in very small enclosures or where airflow is constrained, a lower-profile cooler or a liquid solution designed for tight builds may be a better fit.

Pros & Cons

Pros

• Exceptional heatpipe coverage and dual-tower design deliver strong cooling under sustained load.
• Two TF140S 140mm fans provide high airflow of 90.37 CFM while keeping speeds to 1400 RPM for balanced noise.
• Broad socket compatibility covers modern AMD and Intel platforms, easing installation across builds.
• Included LSP accessory further reduces noise for quieter operation when needed.

Cons

• Large dual-tower size may interfere with tall memory modules or be difficult to fit in tight cases.
• Not the smallest option for small-form-factor builds where low-profile coolers are required.

Specifications

Cooling capacity	280W TDP
Heatpipes	Seven 6mm nickel plated copper heatpipes
Fans	2 x 140mm TF140S dual-layer fans, up to 1400 RPM
Airflow	90.37 CFM (max per fan spec)
Noise level	Under 29.5 dB(A), lower with included LSP
Compatibility	AMD AM4/AM5, Intel LGA 1700/1200/115x/2066/2011 series
Base	Seamless pure copper base

Our Verdict

The DeepCool ASSASSIN III is a strong choice for builders who want air cooling that competes with many 240mm AIOs: it handles high TDP CPUs well, keeps noise reasonable, and supports modern sockets. Choose it if you have adequate case clearance and want a durable, maintenance-free cooler that favors performance over minimal size, offering solid value for enthusiasts and overclockers.

Frequently Asked Questions

Will the Assassin III fit my motherboard?
The cooler supports a wide range of sockets including AMD AM4/AM5 and Intel LGA 1700/1200/115x/2066/2011, but check case clearance and RAM height for compatibility.

How loud are the fans under load?
Fans are rated to keep noise under 29.5 dB(A) at full load, and the included LSP accessory can reduce audible noise further.

Is this suitable for overclocking?
Yes, the 280W TDP rating and seven heatpipes are designed to handle overclocked CPUs for sustained performance without liquid cooling.