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Thermalright Peerless Assassin 120 SE ARGB White CPU Air Cooler, 6 Heat Pipes CPU Cooler, Dual 120mm TL-C12CW-S PWM Fan, AGHP Technology, for AMD AM4/AM5/Intel LGA1700/115X/1851/1155/1200
Thermalright

Thermalright Peerless Assassin 120 SE ARGB White CPU Air Cooler

Bottom line: The Thermalright Peerless Assassin 120 SE ARGB White CPU Air Cooler: Six 6mm copper heat pipes with AGHP for any mounting orientation; main trade-off: 155mm tall, so check your case's CPU cooler clearance first.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ Six 6mm copper heat pipes with AGHP for any mounting orientation
  • ✓ Rated for 120-265W TDP, covering most mainstream desktop CPUs
  • ✓ Dual 120mm PWM fans push up to 66.17 CFM each
  • ✓ Fan noise rated at 25.6 dB(A) or lower
  • ✓ Mounts on AM4, AM5, LGA1700, LGA1851, LGA1200 and LGA115X

Cons

  • ✗ 155mm tall, so check your case's CPU cooler clearance first
  • ✗ 0.97kg listed weight puts a real load on the motherboard
  • ✗ Fans top out at 1550rpm, which limits extra cooling headroom
  • ✗ White finish may clash with all-black builds

Manufacturer description

The Thermalright Peerless Assassin 120 SE ARGB White is a dual-tower CPU air cooler for builders who want strong heat dissipation and a clean white look. Six 6mm pure copper sintered heat pipes use Thermalright's AGHP technique, which is designed to counter the reverse-gravity effect when the cooler is mounted vertically or horizontally. Thermalright rates the cooler for a TDP range of 120 to 265W. Two 120x120x25mm PWM fans spin at up to 1550rpm (plus or minus 10%) and move up to 66.17 CFM, with noise rated at or below 25.6 dB(A). ARGB lighting adds color to your build, and the 4-pin PWM…

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SpecPicks Verdict

SpecPicks scored Thermalright Peerless Assassin 120 SE ARGB White CPU Air Cooler using a rating × review-volume × price-fit model applied to published specs and reviews across the cooling & fans category. Thermalright's cooling & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for cooling & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Will the Peerless Assassin 120 SE fit in my case?

The cooler measures 125mm long, 135mm wide and 155mm tall. Your case needs at least 155mm of CPU cooler clearance, so check your case's spec sheet before ordering.

Does it work with AMD AM5 and Intel LGA1700?

Yes. The listing names AMD AM4 and AM5 plus Intel LGA115X, 1200, 1700 and 1851, and it includes the mounting plates and metal fasteners for each platform.

How loud are the fans?

Each of the two 120x120x25mm PWM fans is rated at 25.6 dB(A) or lower at a top speed of 1550rpm (plus or minus 10%). Because the fans use 4-pin PWM, your motherboard can slow them down at idle.

Will it block my RAM slots?

Thermalright says the design leaves room for memory modules. The listing does not give an exact RAM height clearance, so if your modules have tall heat spreaders, confirm the clearance with the manufacturer.

What CPUs can this cooler handle?

Thermalright rates it for a TDP range of 120 to 265W. That range comes from six 6mm copper heat pipes, a pure copper base and two fans moving up to 66.17 CFM each.

Key Features

  • 【Brand Overview】Thermalright is a Taiwan brand with more than 20 years of development. It has a certain popularity in the domestic and foreign markets and has a pivotal influence in the player market. We have been focusing on the research and development of computer accessories. R & D product lines include: CPU air-cooled radiator, case fan, thermal silicone pad, thermal silicone grease, CPU fan controller, anti falling off mounting bracket, support mounting bracket and other commodities
  • 【Product specification】Thermalright PA120 SE ARGB White; CPU Cooler dimensions: 125(L)x135(W)x155(H)mm (4.92x5.31x6.1 inch); heat sink material: aluminum, CPU cooler is equipped with metal fasteners of Intel & AMD platform to achieve better installation, double tower cooling is stronger
  • 【2 PWM Fans】Model:TL-C12C-S; Colorful and gorgeous ARGB light effects; Standard size PWM fan:120x120x25mm (4.72x4.72x0.98 inches); Product weight:0.97kg(2.1lb); fan speed (RPM):1550rpm±10%; power port: 4pin; Voltage:12V; Air flow:66.17CFM(MAX); Noise Level≤25.6dB(A), leave room for memory-chip(RAM), so that installation of ice cooler cpu is unrestricted
  • 【AGHP technique】6×6mm heat pipes apply AGHP technique, Solve the Inverse gravity effect caused by vertical / horizontal orientation, cpu cooler TDP is 120 to 265W. 6 pure copper sintered heat pipes & PWM fan & Pure copper base&Full electroplating reflow welding process, When CPU cooler works, match with ultra-silent airflow fans, aim to extreme CPU cooling performance
  • 【Compatibility】The CPU cooler Socket supports: Intel:115X/1200/1700/17XX AMD:AM4;AM5; For different CPU socket platforms, corresponding mounting plate or fastener parts are provided

Full Specifications

BrandThermalright
ModelPA120 SE WHITE ARGB 1700-D2
Weight0.97kg
Voltage12 volts
Wattage265 watts
MaterialAluminum,Metal,Silicone
Dimensions4.92x5.31x6.1 inch
Unit Count1 Count
Noise Level25 db
Part NumberPA120 SE WHITE ARGB 1700-D2
Material TypeAluminum,Metal,Silicone
Cooling MethodAir
Number of Items2
Number of Packs1
Air Flow Capacity66.17 cfm
Compatible DevicesDesktop
Power Connector Type4-Pin
Maximum Rotational Speed1550 rpm
Item Dimensions L x W x H4.72"L x 0.98"W x 4.72"H
Full listing titleThermalright Peerless Assassin 120 SE ARGB White CPU Air Cooler, 6 Heat Pipes CPU Cooler, Dual 120mm TL-C12CW-S PWM Fan, AGHP Technology, for AMD AM4/AM5/Intel LGA1700/115X/1851/1155/1200

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Thermalright Peerless Assassin 120 SE ARGB White CPU Air Cooler, 6 Heat Pipes CPU Cooler, Dual 120mm TL-C12CW-S PWM Fan, AGHP Technology, for AMD AM4/AM5/Intel LGA1700/115X/1851/1155/1200 is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Thermalright Peerless Assassin 120 SE ARGB White CPU Air Cooler, 6 Heat Pipes CPU Cooler, Dual 120mm TL-C12CW-S PWM Fan, AGHP Technology, for AMD AM4/AM5/Intel LGA1700/115X/1851/1155/1200
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