Thermalright Peerless Assassin 140 Digital Black CPU Cooler

In this review the Thermalright Peerless Assassin 140 Digital Black is assessed as a high-performance dual-tower air cooler aimed at enthusiasts who need strong cooling without custom liquid loops. The single biggest reason to consider it is its combination of a 12cm plus 14cm fan stack with PWM control and a double-tower design, which delivers notably lower CPU temperatures under sustained loads while keeping noise reasonable. The review covers installation notes, thermal behaviour, and how the ARGB digital top cover adds practical readout and visual flair.

Key Features

• Dual towers and fans: The paired 120mm and 140mm fans move large volumes of air across a tall dual-radiator fin stack to reduce sustained CPU temperatures compared with single-tower coolers.
• S-FDB bearing fans: The included fans use S-FDB bearings for long life and steady performance, helping maintain cooling over years of use.
• PWM intelligent control: 4PIN PWM fan control allows automatic speed scaling with CPU temperature for quieter idle operation and higher speeds under load.
• ARGB magnetic display: The magnetic digital display top cover shows temperature and occupancy information and can be colour-mapped for clear visual feedback when used with the control software.
• Broad socket compatibility: Includes SS2 fasteners and multi-platform grommets for AMD AM4/AM5 and many Intel sockets, making it suitable for upgrades across several CPU generations.

Who It's For

The Peerless Assassin 140 suits PC builders who need stronger air cooling for high-TDP CPUs or who run sustained workloads like content rendering, streaming, or multi-threaded compute. Its dual fans and tall profile work best in mid-tower and larger cases with clearance for a 140x160x165mm cooler.

It is less suitable for extremely compact cases or for users who cannot provide the motherboard backplate required on some AMD installs, since the product does not include the motherboard backplane for AMD platforms. If you need a low-profile or blower-style solution, look elsewhere.

Pros & Cons

Pros

• Strong cooling from the double-tower and combined 120mm/140mm fan pairing.
• Quiet operation at idle thanks to PWM control and soft corner pads that reduce vibration noise.
• Functional ARGB magnetic digital display that gives temperature readouts and customization via software.

Cons

• Large overall size requires case clearance of roughly 140x160x165mm and may block tall RAM modules or fit poorly in compact cases.
• AMD installs require reuse of the motherboard's original backplane, which could complicate installation for some users.

Specifications

Our Verdict

The Thermalright Peerless Assassin 140 Digital Black is a well-engineered dual-tower CPU air cooler that delivers strong thermal performance with manageable noise and a useful ARGB digital top cover. It represents good value for builders who need robust air cooling for high-TDP CPUs and who have the case clearance to accept a 140 x 160 x 165 mm cooler.

Frequently Asked Questions

Will this fit in most mid-tower cases?
It fits many mid-tower and larger cases but you must check clearance for a 140 x 160 x 165 mm cooler and potential RAM height conflicts.

Does it require a separate fan hub?
No, the fans use 4PIN PWM and a Y-adapter is included so two fans can run from a single motherboard header.

Is the ARGB display functional without software?
The magnetic ARGB digital display shows temperatures and occupancy by default, but TRCC control software unlocks colour mapping and customization.