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Small black plastic 40mm cooling fan with four wires and a four-pin connector

Haywards

Haywards cooling fan for DELL OptiPlex 7040M EF70150SX-C020-S9A P/N 2N51K

SKU CH-ZMP7-C99Z3

A 40 mm 12 V cooling fan with double ball bearing, 4-wire PWM control and speeds up to 18 000 RPM for Dell OptiPlex 7040M

  • Keeps the OptiPlex 7040M running cool with a direct-fit 40×40×28 mm design
  • Double ball bearing rated for 70000 hours of continuous operation
  • PWM intelligent temperature control adjusts speed automatically between 7.0 and 13.4 V
  • Delivers 19.4 CFM airflow at up to 18000 RPM for high heat loads
  • 4-wire 4-pin power interface enables speed monitoring and precise control

Cooling Fan for DELL OptiPlex 7040M

This 40mm replacement cooler is built for the DELL OptiPlex 7040M using part number 2N51K. It suits technicians and owners who need a direct swap for a worn or noisy original unit. The fan runs on 12V power and fits the chassis mount without modification.

Installation Notes and Common Issues

The fan uses a 4pin power interface that plugs straight into the system header. Its 40×40×28mm frame matches the original mounting points so no drilling is required. The double ball bearing design reduces wear but the 18000RPM top speed can produce 54 dB of noise, which some users find loud for quiet environments. Ensure the connector orientation matches the motherboard header before securing the screws.

Compatibility Checks Before Ordering

Verify your OptiPlex 7040M carries the EF70150SX-C020-S9A assembly and that the current cooler uses a 4-wire PWM connector. Confirm the available mounting depth can accept a 28mm thick fan and that the system can supply between 7.0V and 13.4V at up to 1A. The plastic heatsink material means this unit is not suited for builds requiring metal radiator construction.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $26.99
Cheaper than about 63% of the 3,838 comparable items (median $41.99).

Specifications

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Product typeOther

Questions about this item

How can I verify the fan is running at the specified 18000 RPM after installation?

The 4-wire PWM interface reports real-time speed to the motherboard; check the reading in BIOS or Dell fan-control software to confirm it reaches 18000 RPM ±10 %.

What components are included with the DBTB0428B2G fan for the OptiPlex 7040M?

The package contains the 40 × 40 × 28 mm fan with a 4-pin power connector; no extra cables, brackets or thermal paste are supplied.

Which voltage version should I choose for the 7040M chassis?

Select the 12 V model (operating range 7.0–13.4 V) that matches the original P/N 2N51K specification.

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