Head-to-head · Best Cpu Air Coolers

be quiet! Pure Rock Pro 3 vs Thermalright Peerless Assassin 120 Mini

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

be quiet! Pure Rock Pro 3 comes out ahead by a clear margin (4.6 vs 4.0). The gap is mostly about users prioritizing noise reduction over peak performance — read the strengths below before deciding.

Higher ratedRanked #1 in Best Cpu Air Coolers

be quiet! Pure Rock Pro 3

4.6

8 sources1 derived$54.9as of Oct 2

be quiet!'s Pure Rock Pro 3 Black offers high cooling performance with its dual-tower design and 6mm heat pipes, delivering strong thermal results while maintaining a compact profile. The included Pure Wings 3 fans provide excellent airflow and pressure, though reviewers noted inconsistencies in the product's specification sheet. TechPowerUp praised its performance and quiet operation, making it suitable for high-end systems and overclocking. Users seeking a balance between cooling capacity and noise will find it well-suited, though those requiring precise fan specifications may encounter issues.

Strengths

— 6 nickel-plated high-performance copper heat pipes with nickel-plated base for excellent heat dissipation
— Two optimized Pure Wings 3 120mm PWM fans with funnel-shaped air outlet for high airflow and pressure
— Compact offset design allows easy installation and compatibility with RAM and VRM coolers

Watch-outs

— Spec sheet contains inconsistencies regarding fan RPM and performance data
— Fan speed may be limited by inaccurate specifications in marketing materials

$54.9 · Check Price on Amazon Full review →

Ranked #5 in Best Cpu Air Coolers

Thermalright Peerless Assassin 120 Mini

4.0

2 sourcesall derived$34.39as of Oct 2

Thermalright's Peerless Assassin Mini delivers exceptional thermal performance in a compact form factor, making it ideal for small-case builds. Machines & More praised its sturdy construction and strong cooling ability despite its reduced size. The cooler features a single 120mm fan with fluid dynamic bearing and is priced at $35, matching the full-size version's cost without discount. While it lacks the premium features of some competitors, its performance justifies the price for users needing a compact solution.

Strengths

— Performs extremely well considering its compact size reduction
— Maintains high-quality materials and sturdy construction despite small stature
— Single 120mm fan with fluid dynamic bearing for quiet operation

Watch-outs

— No price cut from the full-size Peerless Assassin despite size reduction
— Capped fan speed at 1500 RPM compared to Silver Soul 135's 1850 RPM

$34.39 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

be quiet! Pure Rock Pro 3

The be quiet! Pure Rock Pro 3 Black excels in quiet operation and dual-fan airflow, but it's less performant than the Thermalright Phantom Spirit 120 SE which includes an extra heat pipe and better airflow direction options. While it's quieter than the Thermalright Peerless Assassin 120 Mini, it suffers from inconsistent specs that the latter avoids.

Thermalright Peerless Assassin 120 Mini

The Thermalright Peerless Assassin 120 Mini stands out for its compact design that maintains high performance, but it's priced the same as the full-size version, making it less economical than the Thermalright Phantom Spirit 120 SE which offers an extra heat pipe and better value. Unlike the be quiet! Pure Rock Pro 3 Black, it lacks dual fans and has a single 120mm fan capped at 1500 RPM compared to the Pure Rock Pro 3's dual 120mm fans with higher airflow.

Specs side-by-side

Spec	be quiet! Pure Rock Pro 3	Thermalright Peerless Assassin 120 Mini
Height	139 x 124 x 155mm	135 mm
Heat Pipes	6 x 6mm	6 x 6mm
Fan Size	2 x Pure Wings 3 120mm PWM	120mm TL D2B
Noise Level	34.8dB(A) at max speed	25.6 dBA
Compatibility	Intel 1851 / 1700 / 1200 / 1150 / 1151 / 1155; AMD AM5 / AM4	Intel: LGA115X/1200/1700/1851/2011/2066 AMD: AM4/AM5
Price	$54.90	—
Cooler Type	Double-tower air cooler	Dual Towers
Dimensions	5.47"L x 4.88"W x 6.1"H	4.33"L x 5.31"W x 4.92"H
Voltage	12 volts	12 volts
Wattage	3.6 watts	—
Material	Aluminum	Aluminum

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