DragonBall A21 3.4Gh Nexa Miner

DragonBall A21 Key Features

The DragonBall A21 is designed for miners who want dedicated NexaPow performance in an industrial air-cooled format. Its four-fan chassis helps move heat away from the hashboards during continuous operation.

• Manufacturer: DragonBall Miner
• Model: A21
• Product name: DragonBall A21
• Mining algorithm: NexaPow
• Rated hashrate: 3.4GH/s ±5%
• Rated wall power: 1,800W ±10%
• Calculated efficiency: Approximately 0.529J/MH
• Cooling method: Industrial air cooling
• Seller-listed fan count: 4
• Seller-listed noise: Approximately 75dB
• Network connection: RJ45 Ethernet 10/100M
• Seller-listed input voltage: Approximately 165–300V AC
• Seller-listed dimensions: 360 × 185 × 290mm
• Seller-listed net weight: Approximately 16.1kg
• Release period: Late 2024 to early 2025
• Primary cryptocurrency: Nexa
• Recommended use: Dedicated mining rooms and hosting facilities

DragonBall A21 Specifications

Specification note: DragonBall Miner officially confirms the 3.4GH/s ±5% NexaPow rating and 1,800W ±10% power figure. Physical, voltage and environmental figures should be checked against the final factory label and documentation delivered with the machine.

The DragonBall A21 should not be confused with the DragonBall A11 or A40. Those machines support different algorithms and have different power, cooling and firmware requirements.

DragonBall A21 Nexa Mining Performance

The DragonBall A21 generates a rated 3.4GH/s of NexaPow hashrate. Actual pool-side output may move slightly above or below the nominal figure because the manufacturer allows a ±5% hashrate tolerance.

Performance can also vary according to:

• Ambient temperature
• Airflow quality
• Fan condition
• Power-supply stability
• Input voltage
• Firmware version
• Pool latency
• Network uptime
• Hashboard condition

Operators should compare the local DragonBall A21 dashboard with average accepted hashrate on the pool over several hours. Short-term peaks and dips are normal and should not be treated as stable long-term performance.

Important Monitoring Values

• Local real-time hashrate
• Average pool-side hashrate
• Accepted shares
• Rejected and stale shares
• Hashboard status
• Hardware errors
• Chip temperatures
• Fan speeds
• Measured wall power
• Pool latency
• Ethernet uptime

DragonBall A21 Power Efficiency

The calculated efficiency of the DragonBall A21 is:

1,800W ÷ 3,400MH/s = approximately 0.529J/MH

The same figure may be expressed as approximately 529.41J/GH.

This calculation describes electrical efficiency, not guaranteed profit. A miner with favorable efficiency can still lose money when electricity costs, network difficulty, hardware price or downtime are too high.

When comparing the DragonBall A21 with other Nexa miners, evaluate:

• Hashrate
• Power efficiency
• Purchase price
• Electricity rate
• Warranty
• Shipping cost
• Hardware condition
• Cooling requirements
• Expected useful life

DragonBall A21 Electricity Consumption

At a continuous nominal load of 1,800W, estimated electricity use is:

• 43.2kWh per day
• 302.4kWh per week
• 1,296kWh per 30-day month
• 15,768kWh per year

Estimated monthly electricity costs are:

• At $0.04/kWh: approximately $51.84
• At $0.05/kWh: approximately $64.80
• At $0.06/kWh: approximately $77.76
• At $0.08/kWh: approximately $103.68
• At $0.10/kWh: approximately $129.60
• At $0.15/kWh: approximately $194.40
• At $0.20/kWh: approximately $259.20
• At $0.30/kWh: approximately $388.80

Because the manufacturer permits approximately ±10% wall-power variation, actual consumption may differ from these estimates. Measure the miner at the wall for the most accurate calculation.

Ventilation fans, air conditioning, network equipment and electrical-distribution losses can further increase the total operating cost.

DragonBall A21 Cooling and Noise

The DragonBall A21 uses four seller-listed high-speed fans to remove heat from the miner. At approximately 1,800W, the unit releases around 1.8kW of continuous heat into the mining area.

The seller-listed noise level of approximately 75dB makes the machine unsuitable for bedrooms, offices and quiet shared spaces. A dedicated mining room, workshop, warehouse or managed hosting environment is more appropriate.

Cooling Recommendations

• Keep all air intakes unobstructed.
• Provide a clear exhaust path.
• Separate hot exhaust from cool intake air.
• Do not operate the miner inside a sealed cabinet.
• Use extraction fans or ducting where required.
• Monitor chip temperatures and fan speeds.
• Remove dust from fan guards and heatsinks.
• Prevent exhaust recirculation.
• Keep the room below the recommended temperature limit.
• Shut down the miner if cooling fans fail.

DragonBall Miner warns that inadequate ventilation and overheating can damage the machine. The mining location should therefore be designed around continuous heat removal.

Mineable Cryptocurrency with DragonBall A21

Nexa

The DragonBall A21 is designed specifically for mining Nexa using the NexaPow proof-of-work algorithm.

It is not compatible with unrelated algorithms such as:

• Bitcoin’s SHA-256
• Litecoin and Dogecoin’s Scrypt
• Kaspa’s kHeavyHash
• Radiant’s SHA512256d
• Alephium’s Blake3
• Ethereum Classic’s Etchash

Technical algorithm compatibility does not guarantee profitability. Before purchasing the miner, review the current Nexa network difficulty, available pools, wallet support, block rewards and market liquidity.

Learn more about the network through the official Nexa website and monitor blockchain activity using the Nexa block explorer.

DragonBall A21 Mining-Pool Setup

The DragonBall A21 connects to compatible Nexa mining pools through RJ45 Ethernet. Pool mining combines the output of multiple machines and distributes rewards according to accepted shares and the pool’s payment system.

Configuration normally requires:

• A compatible NexaPow Stratum server address
• A Nexa wallet address or pool account
• A worker name
• A pool password
• Secondary and tertiary backup pools

Pool Selection Checklist

• Pool fee
• Payout system
• Minimum payout threshold
• Regional server availability
• Historical uptime
• Pool hashrate concentration
• Security controls
• Monitoring tools

After configuration, confirm that the pool dashboard reports accepted shares and an average hashrate reasonably close to the expected output of the DragonBall A21.

DragonBall A21 Electrical Requirements

The seller-listed input range for the DragonBall A21 is approximately 165–300V AC. DragonBall Miner warns that an incorrect input voltage can damage the machine and recommends using the provided or officially approved power system.

Approximate current at the nominal 1,800W load is:

• Approximately 10.91A at 165V
• Approximately 9A at 200V
• Approximately 8.18A at 220V
• Approximately 7.5A at 240V
• Approximately 6A at 300V

Actual current may vary because of power factor, voltage tolerance, startup behavior and power-supply efficiency.

Electrical Preparation

• Correctly grounded circuit
• Properly rated breaker
• Cables sized for continuous operation
• Manufacturer-approved power supply
• Compatible power connector
• Overcurrent protection
• Surge protection
• Secure electrical terminations
• Emergency disconnect access
• Compliance with local electrical regulations

A qualified electrician should verify the installation before the DragonBall A21 is powered on.

DragonBall A21 Installation Guide

1. Inspect the miner and packaging for shipping damage.
2. Confirm that the factory label states A21.
3. Verify the rated hashrate and power.
4. Confirm the input voltage and power connector.
5. Place the miner on a stable rack or shelf.
6. Provide unobstructed intake and exhaust airflow.
7. Connect the RJ45 Ethernet cable.
8. Connect the approved power system.
9. Power on the miner.
10. Locate its IP address through the router or manufacturer tool.
11. Open the miner’s management interface.
12. Change default credentials where supported.
13. Enter the primary Nexa mining-pool address.
14. Add the wallet or pool-account information.
15. Configure backup pool servers.
16. Save the settings.
17. Wait for the miner to begin submitting shares.
18. Monitor temperatures, fans, hashrate and rejected shares.

During initial operation, monitor the DragonBall A21 for unusual noise, excessive heat, unstable hashrate, repeated restarts and power-cable overheating.

DragonBall A21 Maintenance

Routine maintenance helps the DragonBall A21 maintain stable airflow, temperatures and accepted hashrate.

• Inspect all four cooling fans.
• Remove dust from air intakes and heatsinks.
• Check chip and board temperatures.
• Compare local and pool-side hashrate.
• Review rejected shares and hardware errors.
• Inspect power cables for discoloration or heat damage.
• Check Ethernet cables and network switches.
• Maintain room ventilation equipment.
• Back up settings before firmware changes.
• Use only firmware intended for the A21.
• Disconnect power before cleaning or servicing.

Official firmware, support and warranty resources can be accessed through the DragonBall Miner website.

DragonBall A21 Buying Considerations

Before purchasing a DragonBall A21, compare total ownership cost rather than looking only at the advertised selling price.

Check Before Ordering

• New, used or refurbished condition
• Factory serial number
• Current hashrate test
• Measured wall power
• Hashboard status
• Fan condition
• Power-supply inclusion
• Input-voltage compatibility
• Firmware version
• Remaining warranty
• Seller return policy
• Shipping insurance
• Customs duties and taxes
• Estimated dispatch date

The official manufacturer states that its 180-day warranty applies to eligible original direct purchasers and may not transfer when a miner is resold. Buyers purchasing through a reseller should therefore confirm who is responsible for repairs and warranty claims.

Contact Hash Titans to check current availability, shipping information and purchase support for the DragonBall A21.

DragonBall A21 Frequently Asked Questions