Bitmain Antminer S21 Pro 234T – Bitcoin ASIC Miner SHA-256

Bitmain Antminer S21 Pro for Sale – 234T SHA-256 Bitcoin ASIC Miner

The Bitmain Antminer S21 Pro is one of the most powerful and efficient Bitcoin ASIC miners available, delivering up to 234 TH/s of SHA-256 hashing power with a power consumption of approximately 3510W. As the flagship model in Bitmain's S21 series, the Antminer S21 Pro sets the industry standard for energy efficiency at just 15 J/TH — making it the top choice for professional miners seeking the highest profitability from their Bitcoin mining operations.

Antminer S21 Pro Specifications

• Hashrate: 234 TH/s (SHA-256 algorithm)
• Power Consumption: ~3510W (±10%)
• Energy Efficiency: 15 J/TH
• Mining Algorithm: SHA-256 (Bitcoin, Bitcoin Cash)
• Manufacturer: Bitmain
• Cooling: Dual-fan air cooling
• Connectivity: Ethernet
• Operating Temperature: 5°C to 45°C
• Noise Level: ~75 dB
• Variants Available: 234T and 245T
• Power Supply: APW12 (included)

Why Buy the Antminer S21 Pro?

The Antminer S21 Pro from Bitmain delivers best-in-class energy efficiency for air-cooled Bitcoin miners. With its 15 J/TH efficiency rating, every watt of electricity produces more Bitcoin than competing models. This exceptional antminer s21 pro power consumption ratio means higher profit margins for miners operating at scale, especially in regions with low electricity costs. The S21 Pro is the natural upgrade from the Antminer S19 series and represents a generational leap in mining technology.

Antminer S21 Pro Profitability

When evaluating antminer s21 pro profitability, the key factors are hashrate, power efficiency, and electricity cost. At 234 TH/s and 15 J/TH, the S21 Pro delivers one of the highest revenue-per-watt ratios in the industry. Professional miners running the S21 Pro with electricity costs below $0.08/kWh can expect strong daily returns, making it one of the most profitable air-cooled Bitcoin miners on the market in 2025 and beyond.

Antminer S21 Pro Price & Variants

CaptainMining offers the Antminer S21 Pro in two hashrate variants: the standard 234T model and the premium 245T version for even higher performance. Both variants share the same exceptional energy efficiency and Bitmain build quality. Check our current Antminer S21 Pro price above for the latest competitive pricing with fast Canadian shipping.

S21 Pro vs S21 vs S21 XP

The Bitmain Antminer S21 Pro sits between the standard S21 (200 TH/s) and the newer S21 XP (270 TH/s) in Bitmain's product lineup. The Pro model offers a strong balance of hashrate and efficiency, making it ideal for miners who want top-tier performance without the premium price of the XP series. For those seeking the maximum available hashrate, consider the Antminer S21 XP also available at CaptainMining.

Professional-Grade Bitcoin Mining

The Antminer S21 Pro is built for continuous 24/7 operation in professional mining facilities. Bitmain's industry-leading build quality, advanced ASIC chip design, and robust thermal management ensure long-term reliable performance. Whether you run your own mining farm or use an ASIC hosting service, the S21 Pro delivers the consistent, stable hashrate that serious mining operations require.

What's Included

• 1× Bitmain Antminer S21 Pro (234T or 245T variant)
• 1× Power supply unit (APW12)
• 1× Ethernet cable
• 1× Setup documentation
• Full manufacturer warranty

Antminer S21 Pro for Sale – Available at CaptainMining

Looking for the Antminer S21 Pro at the best price? CaptainMining is your trusted source for genuine Bitmain products. We offer multiple hashrate variants (234T, 245T) and ship from Canada with fast delivery and full manufacturer warranty. Order your Bitmain Antminer S21 Pro today and start mining Bitcoin with cutting-edge ASIC technology.