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Thermalright Peerless Assassin 120 SE ARGB vs Noctua NH-U12S redux

The Peerless Assassin 120 SE ARGB is the stronger cooler: two towers, six heat pipes and two fans give it more raw heat capacity than the single-tower NH-U12S redux, and owners rate it highly. The Noctua is the quieter, simpler, more compact pick, with a five-year warranty and a reputation for long-term reliability. Buy the Thermalright for high-wattage CPUs and a build with room for a 155mm tower; buy the Noctua for a quieter, easier install in a tighter case.

  • Choose the Peerless Assassin 120 SE ARGB if you run a hot, high-power CPU, want ARGB lighting, and your case fits a dual-tower cooler.
  • Choose the NH-U12S redux if you value low noise, a compact single tower, and Noctua's long warranty and mounting support over maximum cooling headroom.

Prices

  • Thermalright Peerless Assassin 120 SE ARGB: $33.90 at Amazon (last seen Nov 13)
  • Noctua NH-U12S redux: $61.68 at anafrashop.com (last seen Nov 13)
  • Difference: the Thermalright Peerless Assassin 120 SE ARGB is $27.78 cheaper than the Noctua NH-U12S redux at the latest prices (Nov 13)
Thermalright
Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler

Thermalright Peerless Assassin 120 SE ARGB

Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler

5(15 ratings)
$33.90at AmazonChecked Nov 13
See all prices and details
Visit Amazon

Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

Pros
  • Two fans and six heat pipes handle high-wattage CPUs
  • ARGB lighting synced through motherboard software
  • AGHP heat pipes work in any mounting orientation
  • PWM control with a 1,550 RPM ceiling
  • Thermal paste included in the box
Cons
  • Louder at full speed than the Noctua
  • Dual tower is bulky and can block RAM slots
  • More mounting hardware to assemble
  • No long warranty program like Noctua's
Noctua
Noctua NH-U12S redux CPU Cooler

Noctua NH-U12S redux

Noctua NH-U12S redux CPU Cooler

$61.68at anafrashop.comChecked Nov 13
See all prices and details
Visit anafrashop.com
Pros
  • Quiet at about 22 dB(A)
  • Five-year warranty and free mounting upgrades for new sockets
  • Compact single tower fits more cases
  • Simple install and low weight
  • No RGB to wire or configure
Cons
  • One fan and five heat pipes limit peak cooling
  • No lighting
  • Brown fan and heatsink finish divides opinion
  • Less headroom for heavily overclocked chips

What separates them

Thermalright Peerless Assassin 120 SE ARGBNoctua NH-U12S redux
Tower designDual tower with six 6mm heat pipesSingle tower with five 6mm heat pipes
Fans includedTwo 120mm ARGB PWM fansOne 120mm PWM fan
Max noiseAbout 25.6 dB(A) per fanAbout 22.1 dB(A)
LightingARGB, controlled via motherboard softwareNone
Height155mm158mm
WeightAbout 730g755g
Warranty and supportStandard limited warrantyFive-year warranty and long-term mounting upgrade support
InstallationSS2 mounting system, more parts to fitSimple single-tower mount, easier in tight cases

Price history

  • Thermalright Peerless Assassin 120 SE ARGB: lowest $33.90 on Nov 13 at Amazon.
  • Noctua NH-U12S redux: lowest $59.95 on Nov 13 at Amazon.

Prices at every store

Thermalright Peerless Assassin 120 SE ARGB

  • WalmartNew

    In stockSold by Tech Wave

    $36.90Checked Nov 13
    Visit Walmart
  • Quiet PCNew

    In stock

    $38.58Checked Nov 13
    Visit Quiet PC
  • Best BuyNew

    In stock

    $39.99+ $10.00 shippingChecked Nov 13
    Visit Best Buy
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $33.90Checked Nov 13
    Visit Amazon

Also available at

  • WalmartCheck price at Walmart

Store links may earn us a commission.

All 12 stores and price history →

Noctua NH-U12S redux

  • Quiet PCNew

    In stock

    $77.12+ $42.99 shippingChecked Nov 13
    Visit Quiet PC
  • anafrashop.comNew

    Availability unknown

    $61.68Checked Nov 13
    Visit anafrashop.com
  • SabrePC.comNew

    Availability unknown

    $68.07Checked Nov 13
    Visit SabrePC.com
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $74.95Free shippingChecked Nov 13
    Visit Amazon

Store links may earn us a commission.

All 8 stores and price history →

Specs compared

SpecThermalright Peerless Assassin 120 SE ARGBNoctua NH-U12S redux
colorBlackBrown
Height (")6.1158mm
Fan Diameter120 mm fan diameter120 mm fan diameter
Noise Level25.6 dB22.4 dB
Fan Size120 millimeters120mm
actual_colorBlack ARGB—
size125(L)x135(W)x155(H)mm—
Noise Level (dB)26—
Fan Rotation Speed (rpm)1550—
No. of Fans2—
Depth (")4.9—
LED LightingYes—
Show all 40 specsShow fewer specs
SpecThermalright Peerless Assassin 120 SE ARGBNoctua NH-U12S redux
Width (")4.3—
FanActive—
Weight (oz)25.7—
Fan Size (mm)120—
Fan Airflow (CFM) (cfm)66.17—
Socket1151, 1155, 1150, 1700, 1156, AM4, 1152, 1200, …—
PWM Fan ControlYes—
Airflow Volume66.17 cubic feet per minute—
Cooling SystemAir—
Fan Speed

What reviewers say

Thermalright Peerless Assassin 120 SE ARGB

  • 5 / 515 ratings

Owners rate it highly, praising cooling for the size and the quiet fans. Complaints center on its bulk and clearance.

What people mention
  • CoolingPraisedOwners say it handles hot CPUs well for an air cooler.
  • NoisePraisedFans are described as quiet at everyday speeds.
  • SizeCriticisedIts height and width cause clearance problems in compact cases.
  • RAM clearanceMixedSome say the front fan overhangs tall memory sticks.

Noctua NH-U12S redux

Owners of the redux line generally praise the quiet fan, simple install and Noctua mounting, and treat it as a sensible value air cooler. Criticism centers on the stripped accessory bundle and the fact that it is a single-fan, single-tower design.

What people mention
  • NoisePraisedOwners say the 120mm fan stays quiet at idle and moderate loads and is tolerable at full speed.
  • InstallationPraisedBuyers describe the Noctua mounting as clear and easy to fit.
  • AccessoriesCriticisedReviewers note the redux bundle is leaner than the standard NH-U12S, with no second fan bracket.
  • Cooling capacityMixedIt handles mainstream CPUs well, but owners say a single tower and fan leave less headroom for very hot chips.

Questions and answers

Which is better for a high-end gaming CPU?
The Peerless Assassin 120 SE ARGB. Its second tower and second fan give it more heat capacity for chips that draw well over 150W. The NH-U12S redux is fine for mid-range CPUs but runs closer to its limit on hot ones.
Which one is quieter?
The Noctua NH-U12S redux. Its fan tops out around 22 dB(A) against roughly 25.6 dB(A) per fan on the Thermalright, and it uses only one fan. The Thermalright is still quiet at low load but gets louder under sustained load.
Will either block my RAM?
The Peerless Assassin's front fan can overhang tall RAM sticks, so you may need to raise it or move it to the rear. The NH-U12S redux is a single tower and clears RAM in most builds.
Which lasts longer?
The Noctua has the edge on paper: a five-year warranty and a history of free mounting kits for new sockets. The Thermalright is well built but carries a shorter standard warranty. Both fans are rated for years of continuous use.
Is the Noctua worth stepping up to?
Only if quiet operation, easy installation and long warranty support matter more to you than cooling headroom. For raw performance per size, the Thermalright does more.
Do both fit AM5 and LGA1700?
Yes. The Peerless Assassin lists AM4, AM5, LGA1700 and older Intel sockets. The NH-U12S redux supports current AMD and Intel sockets through Noctua's mounting kits.

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1550 revolutions per minute
—
Number of Fans Included2—
Lighting TypeRGB—
Product Height25 millimeters—
Product Width120 millimeters—
BrandThermalright—
Model NumberPEERLESS ASSASSIN 120 SE ARGB—
Cooling Fan TypeCPU—
Power Consumption4 watts—
Product Length120 millimeters—
Product Weight49.44 ounces—
Warranty - Parts3 years—
Width with fan—125mm
Fin depth—45mm
Max fan speed—1500rpm
Low-noise fan speed—1200rpm
Fan connector—4-pin PWM
Weight—755 g
Number of heatpipes—5