Corsair

Corsair AF120 Slim

Expert rating7 / 10

Fan Size:: 120 x 15 mm
Bearing Type:: Fluid Dynamic Bearing
Airflow:: 13.4-56.3 CFM
Max Speed:: 2000 RPM
Noise Level:: 5-25.6 dBA
PWM Control:: Yes

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Manufacturer: Corsair Last updated: September 10, 2026

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Corsair AF120 Slim Review

The Corsair AF120 Slim is a 15mm-thick 120mm case fan rated at up to 56.3 CFM and 2000 RPM, with a 5-25.6 dBA noise range, fluid dynamic bearing and PWM control, priced at $24.99.

Both Noctua fans in our catalog use the standard 25mm-thick form factor, the AF120 Slim exists for a completely different problem, cases and radiators where a standard-depth fan simply won't physically fit, at 15mm thick it slots into tighter clearances without giving up meaningful airflow.

Slim Doesn't Mean Weak Here

56.3 CFM at max speed holds up well against standard-thickness fans despite the reduced depth, Corsair's fluid dynamic bearing keeps noise reasonable across the speed range, 5-25.6 dBA is a wide enough band to run near-silent at idle and still move real air under load.

The Clearance Problem This Solves

Compact cases, radiators mounted against a case wall, or CPU coolers with limited RAM clearance are the actual use case here, this isn't a fan you reach for by default, it's the one you reach for when a standard 25mm fan physically won't close the side panel.

Comparison to Alternatives

Against our own Noctua NF-A12x25 PWM, the Noctua is the better all-around performer at standard thickness, the AF120 Slim exists specifically for clearance situations the Noctua can't fit into. Against be quiet!'s Silent Wings 4, also new here, Silent Wings 4 prioritizes acoustic performance at standard thickness, the AF120 Slim is the pick when physical space is the constraint, not noise.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating7 / 10

A clearance-solving slim 120mm fan that keeps most of the airflow a standard-depth fan would give you.

Best for

Tight-clearance builds where a standard 25mm-thick fan won't physically fit.

Not for

Builds with no clearance constraints, a standard-thickness fan like the Noctua NF-A12x25 will generally outperform this one.

Specifications

What these specs mean

Identity and packaging

Brand	Corsair
Model	AF120 Slim
Fan Thickness	15 mm

Design

Fan Size	120 mm
Bearing Type	Fluid Dynamic
Lighting	None

Performance

Static Pressure	1.9 mmH2O
Max Speed	2000 RPM
Noise Level	25.6 dBA
PWM Control	Yes

Performance at maximum speed

Airflow	56.3 CFM

Performance at quiet speed

Min Speed	600 RPM

Airflow direction and frame

Frame Type	Slim

Lighting

RGB Lighting	No

FAQs

What are the key specifications of the Corsair AF120 Slim (120x15mm Slim Profile/56.3 CFM/2000 RPM Max/5-25.6 dBA/Fluid Dynamic Bearing/PWM)?

Key specs for the Corsair AF120 Slim: Airflow 56.3 CFM, Static Pressure 1.9 mmH2O, Noise Level 25.6 dBA, Max Speed 2000 RPM, Fan Size 120 mm, Bearing Type Fluid Dynamic.

Will the Corsair AF120 Slim (120x15mm Slim Profile/56.3 CFM/2000 RPM Max/5-25.6 dBA/Fluid Dynamic Bearing/PWM) work with my current setup?

The Corsair AF120 Slim (120x15mm Slim Profile/56.3 CFM/2000 RPM Max/5-25.6 dBA/Fluid Dynamic Bearing/PWM) lists Fan Size is 120 mm. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the Corsair AF120 Slim (120x15mm Slim Profile/56.3 CFM/2000 RPM Max/5-25.6 dBA/Fluid Dynamic Bearing/PWM) best suited to?

Best suited to: Tight-clearance builds where a standard 25mm-thick fan won't physically fit.

What are the drawbacks of the Corsair AF120 Slim (120x15mm Slim Profile/56.3 CFM/2000 RPM Max/5-25.6 dBA/Fluid Dynamic Bearing/PWM)?

Not the best fit for: Builds with no clearance constraints, a standard-thickness fan like the Noctua NF-A12x25 will generally outperform this one.