Top 10 40mm Case Fan – Computer Case Fans

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1. Noctua

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Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin 40x10mm, Brown

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Noctua #ad - Includes anti-vibration mounts, fan screws, Low-Noise Adaptor, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers.

17. 9 dba, 000 h mtTF. 3-pin 12v flx version can be run 4500 or 3700 rpm using the supplied Low-Noise Adaptors to fine-tune the fan for maximum airflow or near-silent operation. Premium quiet fan, 40x40x10 mm, 4500/3700 rpm, 3-pin molex, 12V, >150, max. Ideal replacement for noisy or broken 12v 4cm fans in 3D printers, NAS, routers, switches, other network and storage devices, DVRs, etc. Award-winning 40x10mm a-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance.
BrandNoctua #ad
ManufacturerNoctua #ad
Height1.57 Inches
Length1.57 Inches
Weight0.35 Pounds
Width0.39 Inches
Part NumberNF-A4x10 FLX
ModelNoctua NF-A4x10 FLX

2. Noctua

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Noctua NF-A4x20 5V PWM, 5V Version 40x20mm, Premium Quiet Fan, 4-Pin, Brown

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Noctua #ad - 14. 9 dba, max. 5000 rpm, 40x40x20 mm, >150, 5v, 000 h MTTF.5v 4-pin pwm version 5000rpm maximum speed for 5V applications with PWM control.

Premium quiet fan, 4-pin pwm, max. 40x20mm size ideal for nvidia jetson nano, switches, 1U applications or replacing fans in network and storage equipment routers, NAS etc. Or other devices such as DVRs. Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers. Award-winning a-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance.
BrandNoctua #ad
ManufacturerNoctua #ad
Height1.57 Inches
Length1.57 Inches
Weight0.4 Pounds
Width0.79 Inches
Part NumberNF-A4x20 5V PWM
ModelNF-A4x20 5V PWM

3. Noctua

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Brown, Noctua NF-A4x20 FLX, Premium Quiet Fan, 3-Pin 40x20mm

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Noctua #ad - Premium quiet fan, max. Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers.

40x20mm size ideal for 1u applications or replacing fans in network and storage equipment routers, switches, NAS etc. Award-winning a-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance. Or other devices such as DVRs. 3-pin flx version provides 5000/4400/3700rpm speed settings via Low-Noise Adaptors to fine-tune the fan for maximum airflow or near-silent operation. 14. 9 dba, 12v, 40x40x20 mm, 5000/4400/370 rpm, 3-pin molex, >150, 000 h MTTF.
BrandNoctua #ad
ManufacturerNoctua #ad
Height0.79 Inches
Length1.57 Inches
Weight5.52 Kilograms
Width1.57 Inches
Part NumberNF-A4x20 FLX
ModelNF-A4x20 FLX

4. SCYTHE

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Scythe Mini Kaze 2, 3500RPM, Quiet 40mm Fan, Single Pack

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SCYTHE #ad - Quiet 40mm fan12v with optimized speed of 3500RPM in order to minimize the produced noise level at highest performance. Fan speed: 3500±15%, airflow: 4. 2cfm, noise: 14dBA. Ideal cooling fan for various applications, NAS, networks, 3D printer, such as SFF computer, DVR etc…. Dimension: 40x40x10mm, mtbf:30, 000hrs, Connector: 2-Pin2-3 Pin adapter included.
BrandSCYTHE #ad
ManufacturerScythe #ad
Part NumberMK4010SL35

5. Noctua

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Brown, Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin 40x20mm

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Noctua #ad - 5000 rpm, max. 14. 9 dba, >150, 40x40x20 mm, 12v, 4-pin pwm, 000 h MTTF. Includes anti-vibration mounts, fan screws, extension cable, y-cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers.

Or other devices such as DVRs. Premium quiet fan, max. Award-winning a-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance. 40x20mm size ideal for 1u servers or replacing fans in network and storage equipment routers, switches, NAS etc. 4-pin pwm version for automatic speed control via 4-pin PWM fan headers, 5000rpm maximum speed 4400rpm with supplied Low-Noise Adaptor.
BrandNoctua #ad
ManufacturerNoctua #ad
Height0.79 Inches
Length1.57 Inches
Weight2.2 Pounds
Width1.57 Inches
Part NumberNF-A4x20 PWM
ModelNF-A4x20 PWM

6. MakerFocus

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MakerFocus 4pcs 3D Printer Fan 12V, 40mm 12 Volt Fan 0.08A DC Mini Quiet Cooling Fan 40X40X10mm with 28cm Cable for 3D Printer, DVR and Other Small Appliances Series Repair Replacement

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MakerFocus #ad - Working current: 008a; air flow: 5. 75±10% cfm; power: 096w; cable length: 280mm. Size: 40 mm x 40 mm x 10 mm; working Voltage: DC 12V. Temperature of usage environment: -10℃ to +70℃. Bearing is high precision, long life and low noise. Oil bearing 30000 hours; certification: CE, UL, CUL.
BrandMakerFocus #ad
ManufacturerMakerFocus #ad
Height0.39 Inches
Length1.57 Inches
Weight0.13 Pounds
Width1.57 Inches
Part Number50IGRFWL2611N

7. Noctua

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5V Version 40x10mm, Noctua NF-A4x10 5V, 3-Pin, Brown, Premium Quiet Fan

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Noctua #ad - Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers. Premium quiet fan, 40x40x10 mm, 4500 rpm, >150, 5v, 3-pin molex, 17.9 dba, 000 h mtTF. Award-winning 40x10mm a-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance. 3-pin 5v version with 4500rpm, not to be used at 12V such as in PC environments. Ideal replacement for noisy or broken 5v 4cm fans in 3D printers, DVRs, NAS, routers, switches, other network and storage devices, etc.
BrandNoctua #ad
ManufacturerNoctua #ad
Height1.57 Inches
Length1.57 Inches
Weight0.22 Pounds
Width0.39 Inches
Part NumberNoctua NF-A4x10 FLX 5V
ModelNoctua NF-A4x10 FLX 5V

8. Gelid Solutions

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Gelid Solutions Silent 4 Case Fan

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Gelid Solutions #ad - 3 years Warranty. Long lifetime 50, 000 h MTTF at 40 C. Silent Operation. Optimized Fan Blades. High airflow and High Static Pressure.
BrandGelid Solutions #ad
ManufacturerGelid Solutions #ad
Height1.6 Inches
Length1.6 Inches
Width0.4 Inches
Part NumberFN-SX04-42
ModelSilent 4

9. AC Infinity

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AC Infinity MULTIFAN Mini, Raspberry Pi, Helmet Cooling Ventilation, UL-Certified for VR Gear, Cosplay, Roku, Compact 40mm x 20mm USB Fan, Aquarium, Router

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AC Infinity #ad - Usb plug can power the fan through USB ports found behind electronics and on portable power banks. Dimensions: 1. 6 x 1. 6 x 08 in. Features a multi-speed controller to set the fan’s speed to optimal noise and airflow levels. Airflow: 12 cfm | noise: 18 dBA| Bearings: Dual Ball. Dual-ball bearings have a lifespan of 67, 000 hours and allows the fans to be laid flat or stand upright. Compact and energy-efficient USB fan designed various DIY cooling and ventilation projects.
BrandAC Infinity #ad
ManufacturerAC Infinity #ad
Part NumberAI-MPF40A
ModelAI-MPF40A

10. ANVISION

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Dual Ball Bearing, ANVISION 2-Pack 40mm x 10mm DC 12V Brushless Cooling Fan, YDM4010B12

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ANVISION #ad - Airflow: 7. 56cfm, speed: 6200prm, noise: 27. 50dbA. Lead wire: 2-pin-2. 5mm connector, length: 150mm / 5. 90inch. Bearing type: Dual Ball Bearing. Warranty: two years, Package: 2x DC brushless fans. Rated voltage: 12v dc, Current: 01a.
BrandANVISION #ad
ManufacturerANVISION INC #ad
Part NumberAN-YDM4010B12
ModelAN-YDM4010B12