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Slim square CPU cooler with black low-profile fan and silver fins, 29mm tall

SXDOOL

SXDOOL C81H 29mm 4-pin PWM CPU cooler LGA1155/1156

SKU CH-561R-29QGD

A 29 mm slim 4-pin PWM cooler with cold-forged base and two-ball bearing fan fits LGA 1155/1156 CPUs in 1U servers and HTPCs

  • PWM control keeps noise low from 28 to 50 dBA
  • 29 mm height fits 1U server and HTPC cases
  • Cold forging with 410 cm² area speeds heat dissipation
  • Two-ball bearing rated for 50 000 hours of operation
  • Mounts on LGA 1155 and 1156 sockets for Core i7, i5, i3

Compact low-profile cooler

The SXDOOL C81H is a 29 mm high CPU cooler built for 1U servers and HTPC chassis where vertical space is tight. It targets Intel LGA1155 and LGA1156 platforms running Core i7, i5, i3, Celeron or Pentium processors. The 90.5 mm square footprint fits standard mounting holes without overhanging adjacent components.

Cold-forged base and two-ball bearing fan

A cold-forged copper base spreads heat across a dense fin array while a 7 cm two-ball bearing fan spins between 3000 and 5000 RPM. The 4-pin PWM connector lets the motherboard adjust speed automatically, delivering 18 to 27 CFM at 28 to 50 dBA. Rated at 12 V and 0.02 to 0.36 A, the fan is specified for 50000 hours of continuous operation.

Mounting kit and thermal paste included

The package supplies a dedicated mounting bracket for LGA1155/1156 sockets, a tube of thermal paste and a printed user manual. No extra brackets or compounds are required for installation on supported Intel platforms. The bundle covers the mechanical and thermal interface needs for a single-socket build.

Highlights

  • PWM control keeps noise low from 28 to 50 dBA
  • 29 mm height fits 1U server and HTPC cases
  • Cold forging with 410 cm² area speeds heat dissipation
  • Two-ball bearing rated for 50 000 hours of operation
  • Mounts on LGA 1155 and 1156 sockets for Core i7, i5, i3

Specifications

No published specifications for this item yet.

Questions about this item

What PWM duty range does the 4-pin connector actually drive the fan between?

The 4-pin PWM connector controls the fan from 3000 to 5000 RPM, delivering 18 to 27 CFM at 28 to 50 dBA.

Will the 90.5 mm square footprint with 29 mm height clear my 1U chassis and LGA1155/1156 mounting holes?

Yes, the cooler measures 90.5 x 90.5 x 29 mm and includes a mounting bracket made for LGA1155 and LGA1156 sockets.

The manual shows a push-pin bracket — do I screw the heatsink to the bracket first, then snap the assembly onto the board?

Correct: attach the cooler to the supplied bracket with the provided screws, then press the bracket pins through the LGA1155/1156 holes until they click.

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