Bitmain
Antminer S21
The Antminer S21 by Bitmain runs the SHA256 algorithm, delivers 200 TH/s, draws 3500W, at 17.5 J/TH efficiency. It mines BTC, BCH, BSV. Available for purchase from MinerHaolan with fast international shipping from Hong Kong and manufacturer warranty included.
Algorithm
SHA256
Hashrate
200 TH/s
Power
3500W
Available Coins
SSL Secured
256-bit encryption
6-12 Month Warranty
Full coverage
Free Shipping
Orders over $5,000
Buyer Protection
Verified seller
The S21 sets a new efficiency standard for air-cooled Bitcoin miners: 200 TH/s at 17.5 J/TH, drawing 3500W. Built on advanced 5nm chip technology, it achieves class-leading performance-per-watt without liquid cooling complexity. Suitable for operators seeking efficiency gains in traditional air-cooled setups. Hashrate and power draw position it well for facilities with standard cooling infrastructure and electrical budgets. Remains highly competitive against newer models, offering proven architecture and strong second-hand resale value in active mining markets.
Key Features
- Industry-leading 17.5 J/TH energy efficiency
- Powerful 200 TH/s hashrate for maximum profitability
- Advanced thermal management with Air-cooled (4 fans)
- Easy setup and management via web interface
Profitability Calculator🟢 Live Data
Estimates for Antminer S21, from live network hashrate and price
| Metric | Daily | Monthly | Yearly |
|---|---|---|---|
| Income | $7.24 | $220.43 | $2,643.16 |
| Electricity | -$6.72 | -$204.56 | -$2,452.80 |
| Profit | $0.52 | $15.88 | $190.36 |
* Revenue from live network hashrate, block time and block reward (source: WhatToMine), assumes a 1% pool fee, and extrapolates today's difficulty and price flat for the monthly/yearly figures. Estimates only, not a guarantee of earnings.
Compare with similar miners
Same algorithm, closest hashrate. Estimated profit assumes $0.08/kWh electricity and live network data.
Bitmain
Bitmain Antminer S21 Bitcoin Miner
- Hashrate
- 200Th/s
- Power
- 3500W
- Efficiency
- 17.5 J/TH
- Cooling
- 4 x High-Speed Cooling Fans
- Price
- $854.10
MicroBT
Whatsminer M70
- Hashrate
- 200 TH/s
- Power
- 3600W
- Efficiency
- 18.0 J/TH
- Cooling
- Air
- Price
- $2,689.00
Canaan
Avalon A1566I Immersion
- Hashrate
- 200 TH/s
- Power
- 2800W
- Efficiency
- 14.0 J/TH
- Cooling
- Immersion
- Price
- $2,099.00
Bitmain
Antminer S19 Pro Hyd
- Hashrate
- 198 TH/s
- Power
- 5445W
- Efficiency
- 27.5 J/TH
- Cooling
- Hydro
- Price
- $1,350.00
Bitmain
Bitmain Antminer S21 BTC Miner (195Th/s)
- Hashrate
- 195Th/s – 188Th/s
- Power
- 3412-3290W
- Efficiency
- 16.9 J/TH
- Cooling
- 4 x High-Speed Cooling Fans
- Price
- $3,509.10
Bitmain
Bitmain Antminer S21 Bitcoin Miner (195Th)
- Hashrate
- 195Th/s
- Power
- 3412W
- Efficiency
- 17.5 J/TH
- Cooling
- Air
- Price
- $3,509.10
Canaan
Avalon A15
- Hashrate
- 195 TH/s
- Power
- 3700W
- Efficiency
- 19.0 J/TH
- Cooling
- Air
- Price
- $1,099.00
Canaan
Canaan Avalon A15XP Bitcoin Miner
- Hashrate
- 206 TH/s
- Power
- 3667W
- Efficiency
- 17.8 J/TH
- Cooling
- Air
- Price
- $1,389.00
Customer Reviews
Sign in to write a review4.4
Based on 26 reviews
Network connectivity is stable
The network connectivity on my Antminer S21 is stable. No random disconnects, no pool connection issues. The Ethernet implementation is solid.
Remarkably cool operation
The Antminer S21 runs remarkably cool despite its hash rate. The thermal efficiency is impressive and it keeps my mining room at manageable temperatures. Great engineering.
Surpasses older generation by far
The Antminer S21 surpasses the older generation by far. If you're running outdated equipment, upgrading to this will transform your operation.
Profitability exceeded expectations
The profitability of my Antminer S21 exceeded my expectations. The combination of price point and performance makes this an outstanding value proposition.
Installed in my basement, no issues
Set up the Antminer S21 in my basement with a dryer vent exhaust modification. Been running 4 months with no moisture or heat issues. The house stays comfortable and I'm stacking sats. Perfect home mining setup.
Frequently Asked Questions about Antminer S21
Related Mining Guides
Antminer S21 Pro For Sale: Price, Review & Where to Buy (234 TH/s)
A full review of the Bitmain Antminer S21 Pro (234 TH/s, 15 J/TH) — specs, profitability math, noise/heat, pricing, and how it compares to the rest of the S21 lineup.
8 min readReviewsBuy Antminer S21 or Whatsminer M60S? 2026 Price & ROI Comparison
Deciding whether to buy the Antminer S21 or Whatsminer M60S? We compare hashrate, efficiency, price per TH, and ROI head-to-head so you can pick the right Bitcoin miner for your budget and power rate.
8 min readGuidesWhere to Buy ASIC Miners in Dubai: Antminer S21 & S19 Shipping, Customs & Price Guide (2026)
A practical guide to buying Antminer S21 and S19 hardware for Dubai: Hong Kong shipping times, UAE customs duty explained, and real total landed costs.
8 min read
