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A21 (3.4 GH/s)
To be released · DragonBall · Air-cooled · SHA-256
The A21 (3.4 GH/s) is a air-cooled NexaPow Nexa ASIC miner from DragonBall released in Dec 2024. It runs at 3.4 GH/s while drawing 1,800 W. It is not shipping yet — create an account to be told when units are available.
A21 profitability
As of Sep 19, 2026, hosted in Argentina at 6.0¢/kWh with 98.7% uptime. Bitcoin $80,934.
| Period | Bitcoin mined | Revenue | Electricity | Profit |
|---|---|---|---|---|
| Daily | 0.000000 BTC | $0.00 | $2.69 | -$2.69 |
| Weekly | 0.000000 BTC | $0.00 | $18.80 | -$18.80 |
| Monthly | 0.000000 BTC | $0.00 | $81.71 | -$81.71 |
| Yearly | 0.000000 BTC | $0.00 | $980.47 | -$980.47 |
Electricity per bitcoin mined: —.
Where to host the A21
| Site | Cooling | Rate | Uptime | Cost per BTC | Profit per month | All-in per unit | Year 1 return |
|---|---|---|---|---|---|---|---|
| UAE | Immersion | 6.0¢ | 99.3% | — | -$82 | — | — |
| Nigeria | Air-cooled | 3.9¢ | 73.6% | — | -$40 | — | — |
| Argentina | Air-cooled | 6.0¢ | 98.7% | — | -$82 | — | — |
A21 specifications
| Specification | Value |
|---|---|
| Manufacturer | DragonBall |
| Model | A21 |
| Release date | Dec 2024 |
| Algorithm | SHA-256 |
| Hashrate | — |
| Power consumption | 1800 W |
| Efficiency | null J/TH |
| Cooling | Air-cooled |
| Weight | 16.1 kg (approx.) |
A21 FAQ
Can I buy the A21?
The A21 is to be released. Create an account and we will tell you when units are available.
What is the hashrate and power consumption of the A21?
The A21 produces 3.4 GH/s of NexaPow hashrate and consumes 1,800 W.
What are the dimensions and weight of the A21?
The A21 measures about n/a and weighs around 16.1 kg.
Is the A21 air-cooled or hydro-cooled?
The A21 is air-cooled with fans. In the UAE we run air-cooled machines in immersion tanks instead, which keeps them cool in desert heat.
Where can the A21 be hosted?
We can host the A21 in UAE (6.0¢/kWh, 99.3% uptime, immersion), Nigeria (3.9¢/kWh, 73.6% uptime) and Argentina (6.0¢/kWh, 98.7% uptime). The Nexa it mines goes straight to your own wallet.
When was the A21 released?
DragonBall announced the A21 in Dec 2024.