Antminer S11 (20.5TH/s) – Air-Cooled Bitcoin Miner

Antminer S11 (20.5TH/s) squeezed the 16nm architecture to its limit — 50% more hashrate than an S9 for only 16% more power.

Antminer S11 Overview

The Antminer S11 is the forgotten model of the range, and that is exactly what makes it interesting. It arrived in November 2018, when the market wanted something faster than the S9 but the 7nm S15 and S17 were not yet ready. Consequently Bitmain extracted everything the existing 16nm architecture could give. Moreover, the result was genuinely impressive for its moment: roughly 50% more hashrate than an S9 for a 16% increase in power draw.

Key Specifications

• Hashrate: 20.5 TH/s (±5%)
• Power Consumption: ~1530 W (±10%)
• Power Efficiency: ~75 J/TH
• Algorithm/Coins: SHA-256 | BTC, BCH, BSV
• Chip Size: 16nm
• Cooling: Dual air-cooled fans
• Noise Level: ~76 dB
• Networking: RJ45 Ethernet 10/100M
• Dimensions: 279 × 221 × 176 mm
• Weight: ~6.5 kg
• Voltage: 12 V
• Operating Temperature: 5–45 °C
• Release Date: November 2018

🛒 Purchasing Guidelines

We accept USD, BTC, ETC, USDC and USDT. Orders ship first-paid, first-shipped, typically within 10–30 working days.

🚚 Shipping Details

Dispatched from Bitmain distribution in Shenzhen and Hong Kong, with US warehouse support in Texas. Customers handle customs clearance; Certificates of Conformity are provided.

🛡 Warranty

Legacy-generation model with limited warranty terms — confirm coverage before ordering.

⚠️ Buyer Considerations

• ~75 J/TH is better than any S9 variant but still well behind the S19 and S21 generations.
• Viable where electricity is roughly under $0.05/kWh; marginal above that.
• 1,530 W fits a 15 A or 20 A dedicated circuit.
• For the same role today — faster than entry level, cheaper than flagship — compare the Antminer S19j Pro at 29.5 J/TH.