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Black 97x33mm 12V 2.65A 4-pin blower fan

OEM Industries

OEM Industries BG0903-B049-POS 97x33mm 12V 2.65A 4-pin blower fan

SKU CH-JYB3-ADE1N

A 97x33mm 12V blower fan with 4-pin PWM control for Dell OptiPlex GX280, 4700C and DIM8300 systems

  • ColorBlack
  • TypeFan only
  • LEDNo
  • Direct replacement for Dell Optiplex GX280
  • 97 x 33 mm blower fits tight chassis
  • 12 V 2.65 A delivers strong airflow
  • 4-pin connector enables PWM speed control
  • NMB manufacture ensures reliable operation

Replacement blower for Dell Optiplex

The OEM Industries BG0903-B049-POS is a 97x33mm 12V 2.65A blower designed specifically for Dell Optiplex GX280 4700C DIM8300 systems. It connects via a standard 4-wire 4-pin interface. This unit serves as a direct replacement when the original factory blower fails or becomes noisy. No LED lighting is included.

Upgrade from worn OEM cooler

It replaces the original NMB blower that shipped with the listed Optiplex models. The jump is worth it when the existing fan rattles, overheats, or no longer spins at full speed. Because the form factor and connector match the OEM design, installation requires no adapter or bracket modification. Builders needing a different airflow pattern or a larger heatsink cannot use this blower.

Sustained airflow in confined chassis

The blower layout pushes air through a narrow duct, maintaining steady pressure across the heatsink during extended workloads. Its 12V 2.65A rating supports continuous operation without the speed drops seen in smaller axial fans under back-pressure. The 4-pin wire allows the motherboard to modulate speed based on temperature, keeping acoustics lower at idle while preserving airflow under load.

Highlights

  • Direct replacement for Dell Optiplex GX280
  • 97 x 33 mm blower fits tight chassis
  • 12 V 2.65 A delivers strong airflow
  • 4-pin connector enables PWM speed control
  • NMB manufacture ensures reliable operation

Specifications

ModelBG0903-B049-POS
ColorBlack
TypeFan only
LEDNo

Questions about this item

Will the 97x33mm blower fit the mounting holes on a Dell Optiplex GX280 chassis?

The blower is built to the 97x33mm form factor used in the GX280, 4700C and DIM8300, so the screw pattern lines up with the original mounting points.

How do I connect the 4-pin PWM header and which wire is the tachometer?

Plug the 4-pin connector into the motherboard CPU fan header; the standard pinout is ground, 12 V, tachometer and PWM control in that order.

When should I expect to replace the blower in a continuously running Optiplex?

NMB rates the bearing for long life at 12 V 2.65 A; plan on a swap if noise rises or airflow drops after several years of 24/7 operation.

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