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Square 70mm black frame fan with four wires visible

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Fans DESC0715B2U 12V .7A 70x70x20mm 4-wire double ball bearing case fan

SKU CH-XXGQ-34YAC

A 70 mm square, 20 mm thick case fan with a 4-wire PWM connector and double ball bearings, running at 12 V and .7 A

  • 4-wire PWM control enables precise speed regulation
  • Double ball bearings extend operating life
  • 70×70×20 mm form factor fits standard 7 cm mounts
  • 12 V .7 A rating delivers strong airflow for cooling

70 mm 4-wire case fan for 12 V systems

This 70 mm case fan runs on 12 V DC and draws 0.7 A through a standard 4-wire PWM connector. The double ball bearing design targets builders who need reliable airflow in tight chassis locations. Its 20 mm thickness fits most slim fan mounts without modification.

Limits of the 4-wire PWM interface

The 4-wire connector enables speed reporting and variable control, but the motherboard header must supply a clean 12 V rail and a PWM signal that matches the fan’s specification. Boards limited to 3-wire voltage control will run the fan at full speed only. Long cable runs or splitters can drop voltage below the level needed for stable start-up.

How it compares

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Price $10.99
Cheaper than about 90% of the 8,339 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Should I pick the 70 mm version or a larger size for my case?

This model is a 70 x 70 x 20 mm fan; choose it when your chassis has 70 mm mounting points. Larger frames will not fit those holes.

What does the 12 V .7 A rating mean for daily operation?

It draws 0.7 A from a 12 V header, so a standard motherboard 4-pin connector can power it directly. The four-wire design also enables PWM speed control.

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