be quiet! Pure Loop 3 280mm Liquid CPU Cooler

The Pure Loop 3 280mm delivers high-performance all-in-one water cooling for overclocked systems without the noise. Designed for users who demand serious cooling power with minimal acoustic output, this AIO cooler handles all consumer CPUs with ease.

Advanced Cooling Performance

At the core of the Pure Loop 3 is a state-of-the-art PWM pump featuring a 6-pole motor that operates at 3000-5500 RPM. This design reduces vibrations to an absolute minimum while maintaining optimal coolant flow. The 280mm aluminum radiator with copper base efficiently dissipates heat from your CPU, keeping temperatures low even under heavy workloads.

Two Pure Wings 3 140mm PWM high-speed fans deliver 72.2 CFM airflow at 1800 RPM while maintaining remarkably quiet operation. With noise levels ranging from just 16.5 dB(A) at 50% speed to 36.6 dB(A) at full speed, the Pure Loop 3 ensures your system stays cool without disturbing your workspace. The fans utilize rifle bearing technology rated for 80,000 hours of operation and feature daisy-chain connectivity for simplified cable management.

User-Friendly Design Features

The Pure Loop 3 includes an easily accessible refill port, allowing you to maintain optimal coolant levels without disassembling the unit. Flexible sleeved tubes measuring 400mm provide installation flexibility in various case configurations. The straightforward mounting system supports Intel sockets 1851, 1700, 1200, 1151, 1150, 1155, and AMD AM5, AM4 platforms.

The cooling block measures 93.4 x 68.5 x 44.9mm with a clean, understated aesthetic that complements any build. No RGB lighting means zero software bloat and a focus purely on cooling performance. The complete unit weighs 1.064kg and includes thermal paste and all necessary mounting hardware.

Quality and Support

Conceived, designed, and quality-controlled in Germany, the Pure Loop 3 meets be quiet!'s rigorous standards for performance and reliability. The cooler comes with a 3-year manufacturer's warranty and access to international support hotlines. All components meet CE, UKCA, and FCC safety certifications, with full RoHS and WEEE compliance.

be quiet! (BW028) SUPREME AND QUIET COOLING

Pure Loop 3 280mm is the impressively high-performing and silent All-in-One water cooling unit for users with overclocked systems. Pure Loop 3 280mm is for all the purists out there that like their cooling power subtle and unagitated.

Impressively high cooling performance for all consumer CPUs
State-of-the-art PWM pump with 6-pole motor reduces vibrations to an absolute minimum
2 Pure Wings 3 140mm PWM high-speed fan offer high static pressure with very quiet operation
Daisy-chained PWM fans for maximum convenience
Flexible sleeved tubes and a simple mounting ensure easy handling
Easy-to-access refill port for convenient handling
Neat design language with elegant looks and subtle details
3-year manufacturer's warranty
Product conception, design and quality control in Germany

Specifications

General data

ModelPure Loop 3 | 280mm
Color option- N/A
Dimensions radiator, incl. fan (H x W x D), (mm)317 x 140 x 52
Dimensions cooling block (H x W x D), (mm)68.5 x 93.4 x 44.9
Total weight (kg)1.064
Socket compatibility Intel1851 / 1700 / 1200 / 1151 / 1150 / 1155
Socket compatibility AMDAM5 / AM4
Noise level (dB(A)) at 50% / 75% /100% rpm16.5 / 28.5 / 36.6
Number of fans2
Lighting connector- No
Tube length (mm)400
Refill portYes

Pump specifications

Pump speed (rpm)5500
Pump adjustable (rpm)3000 - 5500
Pump connector4-pin PWM

Radiator specifications

Dimensions (L x W x H), (mm)317 x 140 x 27
Radiator material / finishAluminum
Base material / finishcopper

Fan specifications

Fan modelPure Wings 3 140mm PWM high-speed
Fan dimensions (mm)140 x 25 x 140
Speed at 100% PWM (rpm)1800
Airflow at 100% PWM / 12V (cfm / m3/h)72.2 / 122.6
Air pressure at 100% PWM / 12V (mm H2O)2.44
Bearing technologyRifle
Motor technology4-pole
Rated voltage (V)12
Input current (A)0.13
Safety current (A)0.45
Input power (W)5.4
Connector4-pin PWM
Cable length (mm)30 / 110 + daisy chain
Lifespan (h / 25°C)80,000

Accessories

Thermal grease (Type)Included
Mounting setIntel, AMD
Adapter cables4-Pin PWM extension
Bottle of coolant (ml)- No
ARGB controller with SATA cable- No
ARGB-PWM-Hub- No
User manual languagesCN, DE, EN, ES, FR, JP, PL, RU, TW

Safety certifications

ApprovalsCE, UKCA, FCC

Environmental directives

RoHSYes
WEEEYes
TrimanYes

Service

Warranty (Years)3
International hotline / free of chargeYes/ DE, FR, US

Logistics data

Dimensions, package (L x W x H), (mm)365 x 205 x 152
Gross weight, package (kg)1.95
Pieces per packaging unit6
Dimensions, shipping box (L x W x H), (mm)476 x 380 x 438
Gross weight, shipping box (kg)13.07

• Product Type: Liquid CPU Cooler
• Radiator Colour: Black
• Max Fan Speed: 1800RPM
• Radiator Size: 240mm
• LED Colour: None