AirFan 40: 40 mm Replacement Fan for Bitaxe Gamma and NerdAxe Gaia

Swap the fan, keep the cooler.

The AirFan 40 is the fan that sits on the cooler of the Bitaxe Gamma and the NerdAxe Gaia when they leave the factory: 40 mm, 5 V, with a 4-pin PWM plug. The firmware sets its speed by the chip temperature, just as it did with the old fan: AxeOS on the Bitaxe Gamma, NerdOS on the NerdAxe Gaia.

Fan or whole cooler

A fan in a miner turns around the clock, and after a long time it can start to rattle, grind or stop. If the heatsink is fine, the fan on its own is all you need: the heatsink and its thermal paste stay on the chip. If the heatsink is damaged too, or you would rather swap everything at once, take the AirBlock 40, the complete stock cooler with this fan fitted.

Which miners it fits

• Bitaxe Gamma: yes, it is the fan the Gamma ships with.
• NerdAxe Gaia: yes, the Gaia ships with the same fan.
• Bitaxe Gamma Copper Pro and NerdAxe Gaia Copper Pro: no. Their copper cooler carries a 60 mm fan.

Swapping it

1. Unplug the power supply and the fan cable.
2. Note which way round the old fan sits, then unscrew it from the heatsink.
3. Fit the AirFan 40 the same way round with the same screws, so the air blows onto the heatsink.
4. Plug the fan into the fan header of the board and power up.

After the first start, check the fan speed and the chip temperature in the dashboard: AxeOS on the Bitaxe Gamma, NerdOS on the NerdAxe Gaia. Our Bitaxe setup guide and NerdAxe setup guide show where to find them.

Quieter

The AirFan 40 runs like the stock fan. For a quieter Bitaxe Gamma, choose the Noctua fan option when you order the Bitaxe Gamma, or upgrade with the Upgrade Kit Stage 1, a larger cooler with a Noctua fan.