Overview
The Bitmain Antminer K7, launched in early 2023, is Bitmain’s specialized ASIC miner for Nervos (CKB) mining using the Eaglesong algorithm. With a powerful hashrate of 63.5 TH/s and a power consumption of approximately 3080 W, it offers efficiency around 48.5 J/TH—making it one of the most capable miners for the Nervos network.
About the Coin: Nervos (CKB)
Nervos Network is a Layer 1 blockchain protocol that focuses on scalability, decentralization, and interoperability. Its native token, CKB (Common Knowledge Base), powers the network’s economic model by enabling users to store data, deploy smart contracts, and pay transaction fees. Nervos uses the Eaglesong proof-of-work algorithm and promotes a “store of assets” philosophy, aiming to be a base layer for decentralized applications, bridges, and cross-chain platforms.
Unlike short-term hype coins, CKB is building long-term infrastructure for modular blockchains and cross-chain applications—making it attractive for strategic mining investments.
Exterior Design
The K7 features a compact industrial chassis measuring 400 × 195 × 290 mm and a net weight of approximately 14.5 kg. The frame follows Bitmain’s proven air-cooled form factor, similar to the S19 series, but internally tuned for Eaglesong optimization.
Power Supply & PSU Details
The integrated power supply supports 200–240 V input at 47–63 Hz, drawing about 16 A at full load. The PSU is built for endurance and thermal reliability, critical for continuous mining operations.
Cooling System
Cooling is handled by dual high-RPM fans designed to manage airflow through dense heatsinks. These ensure that the internal temperature stays optimal even under sustained operation. The K7 is rated at ~75 dB noise level, consistent with other industrial miners.
Fan Specifications
- Model & Size: 4x Nidec High-Static Pressure Fans, 120 × 120 × 38 mm
- Count: 4 fans—front intake and rear exhaust 6000RPM
- Voltage & Current: 12 V DC; high-speed operation – 1.65 AMP
- Speed & Airflow: Designed for max airflow in compact chassis
- Noise Level: ~75 dB under full load
Internal Components
Internally, the K7 features a tightly packed configuration of hashboards, a Bitmain control board with system-on-chip (SOC), and firmware optimized for Eaglesong mining. It follows Bitmain’s industrial build standards with a focus on thermal performance and long-term durability.
PSU
The integrated PSU model is the APW121417B, 14V-17V Output 200-240V – 2x C14 Plugs and it’s high-efficiency power supply engineered for stable voltage under mining-grade loads.
Control Board
Uses the Xilinx 7007 control board with a Bitmain SOC, providing compatibility with Bitmain firmware and remote monitoring tools.
Hashboards & Hashing Performance
- Hashrate: 63.5 TH/s ± 10%
- Hashboard Model: 3x BEC22501 hashboards with 92 BM2042AA ASICs on each board
- Efficiency: ~48.5 J/TH ± 10%
- Power Draw: 3080 ± 10% W (at 25–35 °C)
Hashboards & ASIC Chips
The Antminer K7 hashboards use BM2042AA ASIC chips, specifically designed for the Eaglesong algorithm and optimized for high-efficiency Nervos mining.
Operational Specs
- Algorithm: Eaglesong (Nervos CKB)
- Voltage: 200–240 V AC
- Operating Temp: 0–40 °C; Storage: –20–70 °C
- Humidity Tolerance: 10–90% RH, non-condensing
- Altitude: ≤ 2000 m (with derating above 900 m)
- Network: RJ45 Ethernet 10/100 Mbps
Profitability (Last Update: 23rd June 2025)
- Hashrate: 63.5 TH/s
- Power Draw: ~3080 W ≈ 3.08 kW
- Daily Energy Use: 3.08 kW × 24 h = 73.92 kWh
- Electricity Cost @ $0.01/kWh: 73.92 kWh × $0.01 = $0.74/day
- Estimated Daily Revenue: ≈ $4.50 (per MiningNow.com)
- Estimated Daily Electricity Cost: ≈ $0.74
- Net Profit: $4.50 – $0.74 = $3.76/day
Conclusion
The Antminer K7 is Bitmain’s premier solution for Eaglesong mining, delivering 63.5 TH/s at 3080 W with excellent efficiency for Nervos CKB miners. Equipped with BM2042AA ASIC chips, a rugged APW121417B PSU, and optimized firmware, the K7 is ideal for long-term altcoin mining strategies. Given Nervos’ focus on interoperability and smart contract utility, the K7 remains a smart investment for those who see value in the infrastructure layer of the future blockchain economy.