How to interpret the noise, vibration, and temperature of ASICs

An ASIC miner isn't a silent or cold machine. The noise, vibration, and temperature it generates are part of its normal operation—up to a point. Understanding these signals helps you distinguish what's **normal**, what **requires monitoring**, and what needs **intervention**. This practical guide helps you read and interpret these indicators like a pro.

1. Noises: what your ASIC is telling you

High-power miners, such as modern Bitmain miners, use powerful fans to maintain a safe operating temperature. This generates noise, and that's normal.

Expected noises

• Fans blowing hard — continuous noise: normal .
• Short “howl” at startup — fan test: normal .

Unusual noises

• Metallic or grinding noise — worn fan bearing: monitor .
• Irregular oscillations — unbalanced fan or dust: maintenance required .

Practical comparison: Bitmain models such as the Antminer S21+ 235T , Antminer S21 Pro , and Antminer S21 XP Hydro are known for their loud but consistent airflow. In contrast, the AvalonMiner Q 90T and AvalonMiner Mini 3 generally produce **lower** noise thanks to gentler thermal management.

2. Vibrations: normal, tolerable or alarming?

The vibrations come from the rapid movement of the fans and the passage of air. They are normal if they are slight and constant.

Acceptable vibrations

• Slight, uniform humming against a stable surface: normal .

Worrying vibrations

• The machine moves or “dances” slightly: base instability or unbalanced fan .
• Vibrations that change with load: thermal imbalance or fluctuating power supply .

At equal power, a soft AvalonMiner (Mini 3 or Q 90T) will tend to vibrate **less** than an S21+ or an S21 XP Hydro because its fans often run at lower speeds — at the cost of more gradual heat dissipation.

3. Temperatures: the key indicator

Heat is a direct consequence of computing power. The question is not simply “hot or cold”, but “stable or unstable?”

Standard forks

• Main PCB: 50–75 °C
• ASIC/chips: 60–85 °C
• Expelled air: 40–70 °C

These values ​​vary depending on the environment. A room at 30°C will logically produce higher temperatures than a room at 20°C.

Warning signs

• Rapid fluctuations — air adjustment or faulty fan.
• Continuous rise to 90°C or more — disturbed airflow or dust buildup.
• Above 95–100 °C — imminent automatic shutdown point.

Once again, the S21 XP Hydro models are designed to maintain lower temperatures through liquid cooling, while the air versions (S21+, S21 Pro, Avalon Q 90T) rely solely on ventilation — which requires better airflow.

4. What your “hidden” data reveals

Sometimes we can observe effects that are not "reflected" in the noise or vibration, but which indicate a problem:

• Increased HW errors — a sign of abnormal voltage or temperature.
• Hashrate gradually dropping — often a thermal effect that automatically limits power.

5. When should action be taken?

The three signs that require rapid intervention:

1. Metallic noise or constant clicking.
2. Unstable or constantly rising temperatures.
3. Increased vibrations or machine slipping.

Before taking any physical action, start by:

• Dust off fans and grilles.
• Check that the hot air is not being drawn back in.
• Ensure the base is stable and level.

6. Practical comparison between models (noise & heat)

*Thanks to liquid cooling, noise is reduced and internal temperature is better controlled.

Conclusion

ASICs are noisy and generate heat—that's normal. What really matters is the stability of these signals over time. Loud but constant noise, regular vibrations, and controlled temperatures are indicators of proper operation. Conversely, sudden variations or repeated spikes require immediate inspection.

By intelligently comparing your readings with quieter or more robust models (like the Avalon or the hydro versions of the Bitmain), you will be able to distinguish what is a normal characteristic from a real alert.