The Bitmain Antminer S21 XP (270Th) is one of the most powerful ASIC miners on the market in 2025, designed specifically for Bitcoin (BTC) mining using the SHA-256 algorithm. With a maximum hashrate of 270 terahashes per second (Th/s) and an impressive energy efficiency of 13.5 joules per terahash (J/Th), this machine sets a new benchmark for performance and power optimization in the competitive world of cryptocurrency mining.
Whether you're scaling up your mining operation or entering the space with high-efficiency hardware, the S21 XP offers a compelling blend of speed, reliability, and thermal management. In this detailed guide, we’ll explore its full specifications, profitability potential under various electricity rates, and where to find the best prices from trusted vendors.
Key Features and Specifications
The Antminer S21 XP is engineered for maximum throughput while maintaining industrial-grade durability. Below is a comprehensive breakdown of its technical specs:
- Manufacturer: Bitmain
- Model: Antminer S21 XP (270Th)
- Release Date: September 2024
- Algorithm: SHA-256
- Max Hashrate: 270 Th/s
- Power Consumption: 3645W
- Energy Efficiency: 13.5 J/Th
- Cooling System: Air-cooled with 4 integrated fans
- Noise Level: 75 dB (comparable to urban traffic)
- Dimensions: 400 x 195 x 290 mm
- Operating Temperature: 5°C to 45°C
- Humidity Range: 5% to 95% (non-condensing)
- Network Interface: Ethernet 10/100M
This miner is optimized for continuous operation in data centers or well-ventilated mining farms. Its air-cooling design makes it easier to deploy than liquid-cooled alternatives, though proper airflow and ambient temperature control are essential for sustained performance.
👉 Discover how top-tier miners maximize returns with smart setups and strategic planning.
Mining Performance and Profitability Analysis
Profitability depends heavily on two key variables: electricity cost and current Bitcoin network difficulty. As of early 2025, the Bitmain Antminer S21 XP can generate approximately $12–$18 per day in gross revenue when electricity is priced at $0.06/kWh. However, this figure fluctuates based on BTC price and mining difficulty.
Daily Earnings Estimate (Approximate)
| Electricity Cost (per kWh) | Daily Revenue | Daily Power Cost | Net Daily Profit |
|---|---|---|---|
| $0.04 | $16.50 | $3.50 | $13.00 |
| $0.06 | $16.50 | $5.25 | $11.25 |
| $0.08 | $16.50 | $7.00 | $9.50 |
| $0.10 | $16.50 | $8.75 | $7.75 |
Note: Based on BTC price ~$60,000 and average network conditions in Q1 2025.
At peak efficiency, the break-even period typically ranges between 8 to 14 months, depending on market conditions and operational costs. Miners in regions with subsidized or low-cost electricity (e.g., parts of the U.S., Canada, or Central Asia) stand to gain significantly higher margins.
Bitcoin halving events also play a crucial role — post-halving, block rewards are cut in half, which reduces income unless offset by rising BTC prices or improved operational efficiency.
Coins You Can Mine
While primarily built for Bitcoin (BTC), the Antminer S21 XP supports any cryptocurrency that uses the SHA-256 hashing algorithm, including:
- Bitcoin Cash (BCH)
- Bitcoin SV (BSV)
However, due to lower market capitalization and hash competition, most miners opt to focus solely on BTC, which offers the highest liquidity and reward stability.
Recommended Mining Pools
To ensure consistent payouts and reduce variance in earnings, joining a reliable mining pool is essential. Some of the top pools compatible with the S21 XP include:
- F2Pool – One of the oldest and largest global pools.
- Antpool – Operated by Bitmain, offering seamless integration.
- ViaBTC – Known for transparent fee structures and real-time stats.
- Slush Pool – Pioneer in mining pools with strong security protocols.
- BTC.com Pool – High uptime and user-friendly dashboard.
Choosing a geographically close pool server helps minimize latency and maximize effective hashrate contribution.
Where to Buy the Bitmain Antminer S21 XP
Pricing varies significantly by region, availability, and vendor reputation. Below is a curated list of current market offers from trusted suppliers as of mid-2025:
- Letine Mining (Asia) – $5,100
- UMiners (Hong Kong) – From $5,535
- ASL Miner (China) – $5,535
- YesMining (Hong Kong) – $5,562
- BT-Miners (USA) – $5,599
- Jingle Mining (China) – $5,650
- Apexto Mining (Hong Kong) – $5,750
- August Mining (USA) – $5,893
- Miner Bros (USA) – $5,999
- AsicMarketPlace (USA) – $5,999
- Miners.de (Germany) – €6,499 (~$7,070)
- MineShop (Ireland) – €6,700 (~$7,280)
- MaxiMiners (Czechia) – $799 (likely error or promotional)*
Prices reflect new units in stock unless otherwise noted.
Shipping times vary from immediate delivery to 30+ days depending on location and customs processing. Buyers should verify warranty terms, import duties, and after-sales support before purchasing.
👉 Learn how professional mining operations evaluate ROI before deploying new hardware like the S21 XP.
Frequently Asked Questions (FAQ)
Q: Is the Bitmain Antminer S21 XP still profitable in 2025?
Yes, under favorable conditions — particularly with electricity costs below $0.08/kWh — the S21 XP remains highly profitable. Its 13.5 J/Th efficiency places it among the top-tier ASICs available today.
Q: How loud is the Antminer S21 XP?
It operates at around 75 dB, similar to a vacuum cleaner or busy street noise. For home use, consider placing it in a dedicated room or using sound-dampening enclosures.
Q: What’s the expected lifespan of this miner?
With proper maintenance and optimal environmental conditions, the S21 XP can last 3 to 5 years before efficiency degrades significantly.
Q: Do I need additional accessories to run this miner?
Yes. You’ll need:
- A compatible power supply unit (PSU)
- High-quality power cables
- Stable internet connection
- Cooling solutions if operating in warm climates
Some vendors offer bundle deals including PSU and cables.
Q: Can I mine other cryptocurrencies besides Bitcoin?
Technically yes — any SHA-256 coin can be mined — but Bitcoin offers the best return on investment due to its market dominance and network hash distribution.
Q: How do I calculate my exact profitability?
Use online calculators such as WhatToMine or CryptoCompare, inputting your local electricity rate, current BTC price, pool fees, and network difficulty for accurate estimates.
Final Thoughts
The Bitmain Antminer S21 XP (270Th) represents a significant leap forward in ASIC mining technology. Its combination of high hashrate, excellent energy efficiency, and robust build quality makes it ideal for both individual miners and large-scale operations aiming to stay competitive in an increasingly difficult mining landscape.
When purchasing, always compare prices across multiple trusted vendors, check shipping logistics, and consider total cost of ownership — not just the upfront price tag.
👉 Stay ahead of the curve by exploring advanced strategies used by leading crypto miners worldwide.
With smart planning and efficient operations, the S21 XP can deliver strong returns well into the next Bitcoin cycle — making it a solid investment for serious participants in the decentralized economy.