Overview
The Bitmain Antminer KA3, unveiled in September 2022, is Bitmain’s flagship Blake2S ASIC miner built for Kadena (KDA) mining. Boasting a hashrate of 166 TH/s and a power draw of around 3154 W, it delivers about 19.0 J/TH efficiency—optimized for the Blake2S algorithm.
Exterior Design
The KA3 sports dimensions of 430 × 195.5 × 290 mm (without packaging) and weighs 16.1 kg net (17.7 kg gross). While its size resembles other Bitmain S-series miners, it’s optimized specifically for KDA mining with a solid and compact frame.
Power Supply & PSU Details
It integrates a rugged power supply supporting 200–240 V input at 47–63 Hz and draws approximately 20 A in total. The PSU design is similar to the APW12 used in previous Antminer models and ensures stable delivery for continuous high-performance operation.
Cooling System
The KA3 employs four high-speed fans, each designed to handle demanding thermal loads. These fans maintain safe operating temperatures even under full load, critical for maintaining long-term stability and efficiency. Noise level is rated at around 80 dB, typical for industrial-grade ASIC miners.
Fan Specifications
- Model & Size: High-efficiency Martech fans—120 mm × 120 mm × 38 mm
- Count: 4 fans total—two front intake, two rear exhaust
- Voltage & Current: Each fan operates at 12 V and draws ~1.65 A
- Speed: Rated at ~5,000 RPM for both front and rear fans
- Airflow: Roughly 360 CFM, optimized for dense ASIC layouts
- Noise Level: Operates at approximately 80 dB—standard for this class of equipment
Internal Components
While specific control-board details aren’t officially disclosed, the KA3—like other Bitmain units—features a robust internal configuration with three hashboards and a standardized control board setup that supports reliable performance and firmware upgrades.
PSU
Bitmain’s integrated high-load PSU (similar to APW121417B) supports sustained power delivery with dual power inlets and high-efficiency internal circuitry designed for 24/7 industrial operation.
Control Board
Uses a Bitmain control board with an embedded system-on-chip (SOC), likely based on the Xilinx Zynq family. This provides flexibility and compatibility with other high-end Bitmain models including the KA3.
Hashboards & Hashing Performance
The KA3 includes 3 hashboards delivering a combined 166 TH/s. Efficiency stands at ~19.0 J/TH—outstanding for a Blake2S-algorithm miner. Wall power draw is officially rated at 3154 ± 10 % W, depending on the environment and firmware version.
Hashboards & ASIC Chips
Contains 3× hashboards Model BBK10601 populated with approximately 92 ASIC chips BM2110AA per board (276 total), engineered for high-performance Blake2S hashing with optimal thermal efficiency.
Operational Specs
- Algorithm: Blake2S (used primarily for Kadena and similar chains)
- Voltage: 200–240 V AC
- Operating Temp: 0–40 °C; Storage: –20–70 °C
- Humidity Tolerance: 10–90 % RH
- Network: RJ45 Ethernet 10/100 Mbps
Profitability (Last Update: 23rd June 2025)
- Hashrate: 166 TH/s
- Power Draw: ~3154 W ≈ 3.154 kW
- Daily Energy Use: 3.154 kW × 24 h = 75.70 kWh
- Electricity Cost @ $0.01/kWh: 75.70 kWh × $0.01 = $0.76/day
- Estimated Daily Revenue: ≈ $7.68 (per MiningNow.com)
- Estimated Daily Electricity Cost: ≈ $0.76 ($0.01/kWh)
- Net Profit: $7.68 – $0.76 = $6.92/day
Conclusion
The Antminer KA3 is a powerful and efficient KDA miner, delivering 166 TH/s at ~3154 W, built with high-performance ASIC chips, three hashboards, and a strong cooling system with four 5,000 RPM fans. At low electricity rates, it remains one of the most profitable Blake2S miners, ideal for mining Kadena.
As for Kadena (KDA), its hybrid blockchain model and unique proof-of-work design have strong potential. If adoption continues to rise, the KA3 is well-positioned for long-term returns, making it a top-tier option for industrial and large-scale miners targeting futureproof PoW assets.