We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small square 40mm black fan with four-pin PWM cable

SXDOOL

SXDOOL 9GA0412P3G031Size case fan 40mm 12V 0.39A PWM 28000RPM

SKU CH-FFFH-P22N8 MPN 9GA0412P3G031Size

A 40 x 40 x 28 mm case fan with double ball bearing, 12 V, 0.39 A, 28000 RPM, 16.3 CFM and 58 dBA PWM control

  • 40 mm frame fits tight server chassis
  • 28 000 RPM delivers 16.3 CFM airflow
  • PWM control adjusts speed via 4-pin header
  • Double ball bearing rated for continuous duty
  • 25 cm lead reaches most motherboard headers

Compact 40 mm server fan for dense builds

The SXDOOL 9GA0412P3G031Size is a 40 x 40 x 28 mm case fan built around a double ball bearing and a four-pin PWM interface. It runs on 12 V at 0.39 A and spins up to 28000 RPM, pushing 16.3 CFM through tight server chassis or specialised cooling projects. The 25 cm lead connects directly to a mainboard header for speed control.

Suits 1U racks and custom liquid loops needing

This unit targets builders populating compact rackmount servers, GPU backplates or radiator stacks where a 40 mm frame is mandatory and high static pressure matters. It is not for silence-focused desktop towers, nor for cases that only accept 80 mm or larger fans, nor for anyone unwilling to tolerate 58 dBA at full speed.

28000 RPM maximum speed defines the thermal envelope

The headline spec is the 28000 RPM ceiling, which drives the 16.3 CFM airflow and the 58 dBA noise ceiling. If your thermal budget demands that peak flow in a 40 mm footprint, the fan delivers; if the acoustic limit or mounting pattern rules it out, no other specification will change the fit.

Highlights

  • 40 mm frame fits tight server chassis
  • 28 000 RPM delivers 16.3 CFM airflow
  • PWM control adjusts speed via 4-pin header
  • Double ball bearing rated for continuous duty
  • 25 cm lead reaches most motherboard headers

Specifications

BrandXCLIO

Questions about this item

What are the exact mounting dimensions for the 40 x 40 x 28 mm frame?

The fan uses a 40 mm square frame that is 28 mm thick, matching standard 40 mm mounting holes.

How do I connect the 4-pin PWM connector correctly?

Plug the 4-pin PWM connector into a motherboard 4-pin header; the fourth pin carries the PWM control signal.

When should the double ball bearing be replaced?

Double ball bearings typically last tens of thousands of hours; replace the fan if noise rises above 58 dBA or speed drops below 28000 RPM.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.