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Black plastic AM4 motherboard back-plate with 90mm by 54mm mounting holes

Graviton

Graviton AM4 Radiator Bracket Back Plate 90mm 54mm

SKU CH-BK2N-3PJ96

AM4 motherboard bracket with 90mm by 54mm hole spacing for B350 and X370 chipsets

  • Fits AM4 sockets with 90mm x 54mm hole spacing
  • Supports B350 and X370 chipsets for broad motherboard compatibility
  • 120mm fan delivers 30CFM airflow at 2500RPM
  • Quiet operation at 25dBA with oil-bearing motor
  • Rated 30000-hour fan life for long-term cooling reliability

AM4 Radiator Bracket 90mm 54mm

This mounting bracket fits AM4 motherboards with a 90mm by 54mm hole pattern. It serves as the back-plate and base frame for a compatible radiator or heatsink. The part is new and includes the necessary hardware for installation. It is designed for processor cooling applications on supported chipsets.

Builders Using B350 or X370 Boards

The bracket suits builders fitting a 120mm oil-bearing fan cooler to a B350 or X370 motherboard. It will not work on boards with different mounting-hole spacing or on non-AM4 sockets. Buyers needing a universal bracket for multiple platforms should look elsewhere. The fixed hole pattern limits compatibility to the specified layout.

3-Pin 2500RPM Fan Interface

The included 120mm fan connects via a 3-pin power header and runs at 2500 RPM. This fixed-speed design delivers 30 CFM airflow at 25 dBA noise. Systems requiring PWM control or a 4-pin header cannot regulate this fan. The 3-pin connection is the decisive specification for motherboard compatibility.

Highlights

  • Fits AM4 sockets with 90mm x 54mm hole spacing
  • Supports B350 and X370 chipsets for broad motherboard compatibility
  • 120mm fan delivers 30CFM airflow at 2500RPM
  • Quiet operation at 25dBA with oil-bearing motor
  • Rated 30000-hour fan life for long-term cooling reliability

Specifications

No published specifications for this item yet.

Questions about this item

Will the 90mm x 54mm hole spacing match my B350 motherboard?

Yes, the bracket is designed for AM4 boards including B350 and X370 chipsets with that exact mounting pattern.

How do I verify the fan is running correctly after installation?

The fan should spin at 2500 RPM with a noise level of 25 dBA and deliver 30 CFM of airflow.

Does the package include the 120mm fan and 3-pin power cable?

Yes, the 120x120x25mm fan with oil bearing and 3-pin connector is included in the box.

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