be quiet! Pure Rock 3 LX

Air · 154 mm tall · cools 190 W

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Type Air
Fan size 1x 120 mm
Height 154 mm
Rated cooling 190 W
sockets LGA 1851, LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1200 (Socket H5), LGA 1700, Socket AM4, Socket AM5

be quiet! Pure Rock 3 LX is an air CPU cooler with 1x 120 mm fans. Check that it supports your CPU socket and fits your cabinet.

Specifications

Key specs

Type: Air
Fan size: 1x 120 mm
Height: 154 mm
Rated cooling: 190 W
sockets: LGA 1851, LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1200 (Socket H5), LGA 1700, Socket AM4, Socket AM5
Part number: BK040
EAN / UPC: 4260052192498

Performance

Suitable location: Processor
Type: Air cooler
Fan diameter: 12 cm
Supported processor sockets: LGA 1851, LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1200 (Socket H5), LGA 1700, Socket AM4, Socket AM5
Rotational speed (max): 2000 RPM
Noise level (low speed): 12.4 dB
Noise level (high speed): 31.2 dB
Maximum airflow: 61.8 cfm
Airflow: 105.1 m³/h
Maximum air pressure: 2.51 mmH2O
Pulse-width modulation (PWM) support: Yes
Bearing type: Rifle bearing
Quantity per pack: 1 pc(s)
Fan's mean time to failure (MTTF): 60000 h

Design

Product colour: Black
Base plate material: Copper
Number of fans: 1 fan(s)
Fins material: Aluminium
Number of heat pipes: 4
Illumination LED: Yes
Illumination colour: Multi
Fan connector: 4-pin
Display type: Not applicable

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Power

Fan power consumption: 3.6 W
Thermal Design Power (TDP): 190 W
Fan voltage: 12 V
Fan current: 0.15 A

Weight & dimensions

Width: 124 mm
Depth: 71 mm
Height: 154 mm
Radiator width: 12.4 cm
Radiator depth: 4.6 cm
Radiator height: 15.4 cm
Weight: 570 g
Fan dimensions (W x D x H): 120 x 120 x 25 mm
Fan thickness: 2.5 cm
Heat pipes diameter: 6 mm
Cable length: 0.12 m

Technical details

Warranty period: 3 year(s)
Sustainability certificates: Triman
Compliance certificates: CE, RoHS, UKCA, UL, WEEE

Check the manufacturer's page before buying.

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About this product

Compact Performance for everyone Pure Rock 3 LX rocks your system with very high performance in a compact design and a spectacular, optimized Light Wings LX 120mm PWM fan. This air cooler proves impressively that size does not always matter: despite its compact footprint, Pure Rock 3 LX serves you as a cooling powerhouse. And with its preinstalled mounting, installation is done in the blink of an eye.

User manual (PDF) · Datasheet (PDF)

Pure Rock 3 LX vs similar CPU coolers

	be quiet! Pure Rock 3 LX	be quiet! Pure Rock 3 Black	Hiditec DC20 PRO	Zalman ZET5 CPU Cooler
Type	Air	Air	Air	Air
Fan size	1x 120 mm	1x 120 mm	1x 120 mm	1x 120 mm
Height	154 mm	154 mm	157 mm	158 mm
Rated cooling	190 W	190 W	240 W	220 W
sockets	LGA 1851, LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1200 (Socket H5), LGA 1700, Socket AM4, Socket AM5	LGA 1851, LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1200 (Socket H5), LGA 1700, Socket AM4, Socket AM5	LGA 1851, LGA 1700, LGA 1200 (Socket H5), LGA 1156 (Socket H), LGA 1155 (Socket H2), LGA 1151 (Socket H4), LGA 1150 (Socket H3), LGA 1366 (Socket B), Socket AM4, Socket AM5, Socket AM3+, Socket AM3, Socket AM2	LGA 1851, LGA 1700, LGA 1200 (Socket H5), Socket AM4, Socket AM5, LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1156 (Socket H)
Released	—	—	2026	2025