Should I connect the fan to the motherboard or power supply?

Motherboard headers enable speed control (best for 4-pin PWM). PSU Molex runs at 12V full speed (noisy). Keep total current per header under 1A when using splitters.

Why does the fan spin at 5V if labeled 12V?

The motor has a wide tolerance (5V-13V). It may not start below ~7V but will spin at 5V once started.

Do more blades mean better performance?

More blades increase static pressure but may be louder. Fewer blades provide higher airflow with lower noise. A balance of 7-9 blades is typical.

How do I know if the fan is dying?

Listen for clicking/grinding sounds. Check RPM via software; significantly lower RPM indicates issues. Power off and flick the blade; wobble or stiffness signals worn bearings.

90X90X38mm Silent Operation High Pressure Axial Flow Fan for Power Supply Cooling

Name: 90X90X38mm Silent Operation High Pressure Axial Flow Fan for Power Supply Cooling
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2155291342

Shanghai, ChinaFengxia Motor (Shanghai) Co., Ltd.

US$2.20

500-4,999 Pieces

US$1.00

5,000+ Pieces

Sample price:US$4.00/piece.Request sample

Product profile

Customization

Available

Material

Plastic-Iron-Copper-Magnet

Blade Material

PBT 94ulv

Model NO.

FD9038

Type

DC Axial Flow Fan

Electric Current Type

Mounting

Free Standing

Certification

RoHS, ISO, CE

Insulation Resistance

10mωor Over with at DC250V Megger

Ielectric Withstand Voltage

AC500V1s

Ambient Temperature

-10℃~+70℃(Operating) -40℃~+70℃(Storage)

Expected Life

+40° ,30000 Hours

Transport Package

Paper Box

Specification

Customized

Trademark

FUNSHARE

Origin

China

Production Capacity

100000 Pieces/Year

Key features

Ultra-Quiet Operation: Designed for silent performance, ideal for noise-sensitive environments like offices and home use.

High Durability & Long Life: Double-ball bearings offer 5-10 years lifespan; sleeve bearings last 2-3 years with stable performance.

Versatile Voltage Compatibility: Operates on wide voltage range 5V-13V, compatible with both motherboard headers and power supplies.

Professional Cooling Solutions: Tailored for notebooks, projectors, UAVs, and VR headsets with efficient heat dissipation.

Certified Quality & Safety: Meets RoHS, ISO, CE, and FCC standards with 100% finished product inspection.

Flexible Control Options: Supports 3-pin DC voltage control and 4-pin PWM for precise, quiet speed adjustment.

Customization Capability: Offers full customization from samples or designs to meet specific client requirements.

Compact & Portable Design: 90x90x38mm size ensures easy integration into various electronic devices and tight spaces.

Company profile

Importers and ExportersHigh Repeat Buyers Choice

Fengxia Motor (Shanghai) Co., Ltd.

Shanghai, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 5 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤3.12h

AI-Powered supplier vetting

SummaryThe supplier demonstrates strong customization, R&D, OEM/ODM, quality-control, and complaint-handling capabilities. It reports new products within the past year, provides customization from samples and designs through full customization, and serves known brands through OEM. Production includes two lines, inventory capability, defined inspection procedures, and four QA/QC inspectors. However, important operational limitations exist: no available SDK, no overseas agents, branches, warehouse, or showroom, no offline trade-show participation, and only one experienced export-trade employee. Manufacturing controls also show gaps, including no ongoing quantity reconciliation for each batch and no standard operating procedure for outsourced manufacturing. Financial evidence is represented only by years rather than substantive indicators, so credibility cannot be determined. The supplier holds an ISO9001:2015 certificate, but the available information does not establish broader certification coverage.

Supplier typeThe supplier operates as a manufacturer with two production lines, provides OEM and ODM services, offers inventory capability, and accepts FOB and EXW quotations. It also provides full customization, but lacks overseas agents, branches, warehouses, and showrooms.

CertificationsThe supplier reports an ISO9001:2015 certificate. No additional specific certifications are identified in the provided information.

After-Sales capabilityThe supplier has documented and followed procedures for customer complaints and corrective/preventive actions, supporting an established service-response process. However, it has no overseas agents, branches, warehouse, or showroom, which limits demonstrated overseas service infrastructure.

R&D capabilityThe supplier reports new products in the past year, provides ODM services, and assigns R&D personnel to product development, design drawings, production support, and specifications. Nevertheless, it has no available SDK and no design input, output, review, validation, or confirmation documents available for audit.

Production capacityProduction evidence includes two production lines, inventory capability, one-month average lead times in both peak and off-season periods, four QA/QC inspectors, written finished-product inspection instructions, and multiple listed production machines. Controls are weakened by the absence of ongoing batch quantity reconciliation and a standard operating procedure for outsourced manufacturing.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, and full customization, with the same capability reported under both R&D and design services. This directly demonstrates broad customization coverage.

Product Q&A

Q:What causes fan noise and how to fix it?

Noise may result from loose screws, dust buildup, or bearing type. Fix by tightening mounts, cleaning dust, lowering RPM via BIOS, or choosing hydraulic bearings for a balance of quietness and durability.

Q:How do I determine the correct airflow direction?

Look for arrows on the frame. Front/side intake brings cool air in; rear/top exhaust removes hot air. Tower coolers should push air toward the rear exhaust.

Q:What is the difference between 3-pin and 4-pin connectors?

3-pin uses DC voltage control for fixed/stepped speeds. 4-pin uses PWM for auto, precise, and quieter speed control. A 4-pin fan on a 3-pin header runs at full speed.

Q:How long does the fan last?

Sleeve bearings last ~2-3 years. Hydraulic bearings last ~4-5 years. Double-ball bearings last 5-10 years and tolerate 24/7 operation best.

Q:How can I make the fan quieter?

Use rubber grommets instead of screws, use a low-noise adapter or inline resistor to lower voltage, or adjust the BIOS fan curve to keep RPM low until temperatures rise.