Bitmain
Antminer S21
The Antminer S21 by Bitmain is a SHA256 ASIC miner delivering 200 TH/s at 3500W power consumption with 17.5 J/TH efficiency. It mines Bitcoin, Bitcoin Cash, Bitcoin SV. 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
180-Day 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
Daily Power
84.0 kWh
Power Cost
-$6.72
Daily BTC
0.00009939 BTC
Revenue
$6.58
Daily
-$0.14
Monthly
-$4.41
Yearly
-$52.89
* 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.
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 If you're running outdated equipment, upgrading to this will transform your operation.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
Bitcoin Mining with Solar Panels: A Complete Guide
Learn how to combine photovoltaic systems with ASIC miners for eco-friendly and cost-effective mining operations.
8 min readReviewsAntminer S21 Pro For Sale: Price, Review & Where to Buy (234 TH/s)
Looking to buy the Antminer S21 Pro? Full review of Bitmain's flagship 234 TH/s miner — price, profitability, noise tests, and where to buy in stock.
6 min readAnalysisHome Mining in 2026: Is It Still Profitable?
Analysis of home mining profitability with current difficulty levels and electricity costs across different regions.
10 min read
