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be quiet! Pure Rock 3 LX 120mm Rifle CPU Cooler BK040 LED RGB Socket compatibility Intel 1851 / 1700 / 1200 / 1150 / 1151 / 1155, and AMD AM5 / AM4

  • Very high cooling capacity for modern CPUs
  • Light Wings LX 120mm PWM ARGB fan with funnel shaped air outlet for equally high performance and stunning visuals
  • 4 black high-performance 6mm heat pipes with HDT technology
  • Achieves only 31.2dB(A) at maximum fan speed
  • High RAM and VRM cooler compatibility thanks to a compact design
  • Preinstalled cooler mounting bridge for a fast and easy installation
  • Elegant looks in an all-black design
  • 3-year manufacturer’s warranty
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Overview
Specs
Reviews (1)
be quiet! Pure Rock 3 LX CPU Cooler
be quiet! Pure Rock 3 LX CPU Cooler

PURE ROCK 3

LX

Compact Performance for everyone

Pure Rock 3 LX rocks your system with very high performance in a compact design and a specially designed Light Wings LX 120mm PWM fan.

  • Very high cooling capacity for modern CPUs
  • Light Wings LX 120mm PWM ARGB fan with funnel shaped air outlet for equally high performance and stunning visuals
  • 4 black high-performance 6mm heat pipes with HDT technology
  • Achieves only 31.2dB(A) at maximum fan speed
  • High RAM and VRM cooler compatibility thanks to a compact design
  • Preinstalled cooler mounting bridge for a fast and easy installation
  • Elegant looks in an all-black design
  • 3-year manufacturer’s warranty
be quiet! Pure Rock 3 LX CPU Cooler

Pure Rock 3 is ready for modern flagship CPUs like Intel's Core i9 or AMD's Ryzen 9 series.

KEEP IT COOL

Very high cooling performance

Pure Rock 3 LX is aimed at consumer PCs. With 190 W TDP it offers an excellent cooling capacity for gaming, multimedia and graphics systems, as well as mainstream or entry level computers of all types. The performance is further increased by funnel-shaped air outlets on the Light Wings LX 120mm PWM fans, which increases airflow over the fins. In addition, the fan blades are optimized for maximum airflow, making this fan the ideal match for Pure Rock 3 LX.

IMPRESSIVE LIGHTING

Lots of illumination possibilities

16 LEDs are located inside the hub of the impeller of the Light Wings LX 120mm PWM and shine outwards onto the frosted fan blades. This creates an unmistakable look and enables you to express your creativity.

be quiet! Pure Rock 3 LX CPU Cooler

HIGH-PERFORMANCE HEAT PIPES

Ensuring perfect heat transfer

Pure Rock 3 LX is equipped with 4 black 6mm heat pipes, matching the color of the heat sink. The heat pipes are key to the cooler’s great cooling performance, because they transport the heat to optimum locations on the cooling fins. They do so with minimal bends and high bending radius, to maintain the performance of each heat pipe as good as possible.

MULTIPLATFORM

Second to none compatibility

The Pure Rock 3 LX’ slim design increases RAM and VRM cooler compatibility significantly and enables limitless memory height. Thanks to its compact construction Pure Rock 3 LX is the perfect choice for PC cases that have limited space. Notwithstanding, it allows full configuration of RAM banks.

be quiet! Pure Rock 3 LX CPU Cooler
be quiet! Pure Rock 3 LX CPU Cooler

SUPER EASY INSTALLATION

No tutorial needed

Installation is easier than ever with the Pure Rock 3 LX. Thanks to its convenient, preinstalled mounting bridge plus screws and a firm yet gentle fixing method, cooler attachment is a breeze. Users of an AM5 CPU by AMD can benefit from an offset mounting to center the heat pipes above the hot spots of their CPU.

DESIGN UPGRADE

Makes your system look sharp

Who says that neat looking products must be expensive? Pure Rock 3 LX comes in an unmistakable all-black design which perfectly complements the lighting effects its fan offers. Every little detail is carefully arranged, making Pure Rock 3 LX a design gem in its class.

be quiet! Pure Rock 3 LX CPU Cooler

"You asked for it, we deliver: a compact air cooler with enough performance to cool modern CPUs nonetheless. Pure Rock 3 LX is here, offering an unbeatable compactness-to-performance ratio! The ARGB illumination is the icing on the cake for me."

Lea Brock, Head of Social Media and Content

be quiet! Pure Rock 3 LX CPU Cooler be quiet! Pure Rock 3 LX CPU Cooler

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Return Policies

    We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.

  • Return for refund until: January 31, 2027
  • Return for replacement until: January 31, 2027
  • This item is covered by Newegg.ca's Extended Holiday Return Policy.
  • Read full return policy for details.
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The be quiet! Pure Rock 3 LX is a 120mm RGB air CPU cooler rated for up to 190W TDP, suited to users building compatible Intel or AMD systems who want strong cooling, quiet operation, and lighting in a compact design.

Recommended For

  • PC gamers building around a mainstream CPU who want air cooling for gaming sessions, with a single-tower cooler and ARGB lighting rather than a larger dual-tower design.
  • Everyday desktop users who want a quieter air-cooled PC for mixed work, browsing, and multimedia; a review found the fan unobtrusive during testing.
  • Builders fitting a cooler around tall RAM or nearby motherboard components who want a slim single-tower layout; be quiet! highlights RAM and VRM clearance as a design benefit.
  • PC builders who want visible ARGB in a black air-cooled system and prefer lighting integrated into the CPU-cooler fan.

Spec Summary

AttributeValue
Best ForAir cooling for compatible Intel and AMD desktop CPUs, with addressable RGB lighting
Socket CompatibilityAMD AM4 and AM5; Intel LGA 1150, 1151, 1155, 1200, 1700, and 1851
Cooling Performance190W TDP air cooling with up to 61.8 CFM airflow, 2.51 mm H₂O pressure, and maximum noise of 31.2 dBA
Fan And Lighting120 mm rifle-bearing fan with addressable RGB lighting, up to 2000 RPM, 4-pin PWM power, and 12 V operation
Heatsink And DimensionsAluminum-and-copper heatsink measuring 154 × 124 × 46 mm; maximum cooler height is 154 mm, and weight is 570 g
Fan Dimensions And Mounting120 × 120 × 25 mm fan mounted vertically to the heatsink
Model Identifiersbe quiet! Pure Rock 3 LX, model BK040; black finish