Bitmain Antminer S21 XP Immersion (300Th) Profitability and Best Prices

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The Bitmain Antminer S21 XP Immersion (300Th) is setting new benchmarks in the Bitcoin mining industry. With its cutting-edge immersion cooling technology and exceptional hashrate efficiency, it's quickly becoming a top choice for serious miners looking to maximize returns in 2025 and beyond. This comprehensive guide explores everything you need to know about this powerful ASIC miner—from technical specifications and energy efficiency to profitability analysis and where to find the best prices.

Overview of the Bitmain Antminer S21 XP Immersion

Manufactured by Bitmain, a global leader in cryptocurrency mining hardware, the Antminer S21 XP Immersion is engineered specifically for mining Bitcoin (BTC) using the SHA-256 algorithm. It delivers a maximum hashrate of 300 terahashes per second (Th/s) while consuming 4,050 watts of power. This results in an impressive energy efficiency rating of just 13.5 joules per terahash (J/Th)—making it one of the most efficient miners available today.

Designed for large-scale mining operations, the S21 XP Immersion integrates oil-based immersion cooling, which significantly reduces noise levels and improves thermal management compared to traditional air-cooled models.

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Key Specifications

Here’s a detailed breakdown of the Antminer S21 XP Immersion’s core specs:

This model is optimized for continuous operation in industrial environments where temperature control and long-term reliability are critical.

Mining Performance and Algorithm Support

The Antminer S21 XP Immersion runs on the SHA-256 hashing algorithm, making it ideal for mining Bitcoin (BTC) and other SHA-256-compatible cryptocurrencies such as Bitcoin Cash (BCH) and Syscoin (SYS). However, due to Bitcoin's dominant network difficulty and market value, most operators focus exclusively on BTC mining.

With a hashrate of 300Th/s, this device contributes substantial computational power to any mining pool, increasing the likelihood of consistent block rewards.

Energy Efficiency: Why It Matters

Energy efficiency is one of the most important factors in determining mining profitability. The S21 XP Immersion’s 13.5 J/Th efficiency places it among the elite tier of ASIC miners. For context, older models like the Antminer S19 series operate at around 29–34 J/Th—nearly double the energy cost per unit of work.

Lower energy consumption means reduced electricity costs, especially crucial in regions with high power rates. When combined with immersion cooling, which lowers ambient heat output and extends hardware lifespan, the S21 XP offers both economic and operational advantages.

Profitability Analysis (2025 Outlook)

Mining profitability depends on several variables:

Assuming a stable BTC price of $60,000 and average electricity costs of $0.07/kWh, the Antminer S21 XP Immersion can generate approximately $18–$22 per day in gross revenue after accounting for power usage. Annual profits could exceed $6,500, not including potential BTC price appreciation.

At this rate, the miner can pay for itself within 8–12 months, depending on purchase price and local energy rates.

💡 Note: Profitability projections are estimates based on current market conditions. Always use real-time calculators to adjust for fluctuating variables.

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Where to Buy: Best Prices & Trusted Vendors

Finding reliable suppliers is key to avoiding scams or inflated pricing. Below is a curated list of trusted vendors offering competitive rates for the Antminer S21 XP Immersion (as of early 2025):

While some vendors offer unusually low prices, always verify authenticity, warranty terms, and shipping logistics before purchasing. Units from reputable dealers often come with full factory support and easier access to firmware updates.

Mining Pools and Setup Guidance

To start mining, connect your Antminer S21 XP Immersion to a reliable mining pool such as:

These platforms distribute rewards based on contributed hashrate, ensuring more predictable income than solo mining.

Configuration is straightforward via the miner’s web interface using its Ethernet connection. You'll input your wallet address and pool credentials during setup.

Frequently Asked Questions (FAQ)

Q: Is the Antminer S21 XP Immersion suitable for home mining?
A: Due to its high power draw and specialized oil-cooling system, it's better suited for data centers or industrial setups rather than residential environments.

Q: What is immersion cooling, and why does it matter?
A: Immersion cooling involves submerging hardware in non-conductive liquid to dissipate heat efficiently. It reduces noise, prevents overheating, and increases component longevity.

Q: Can I mine coins other than Bitcoin with this device?
A: Yes, technically it supports any SHA-256 coin, but Bitcoin remains the most profitable option due to its market dominance.

Q: Does the miner come with a power supply unit (PSU)?
A: Most listings include a compatible PSU, but confirm this with your vendor before purchase.

Q: How often should I maintain the immersion tank?
A: Maintenance intervals vary, but checking fluid levels and cleanliness every 6–12 months is recommended for optimal performance.

Q: Is firmware upgrade support guaranteed by Bitmain?
A: Yes, Bitmain typically provides ongoing firmware updates for security, stability, and performance improvements.

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Final Thoughts

The Bitmain Antminer S21 XP Immersion (300Th) represents the future of efficient, large-scale Bitcoin mining. Its combination of ultra-low power consumption, advanced cooling technology, and robust hashrate makes it a smart investment for professional miners aiming to stay competitive in an increasingly difficult network environment.

As Bitcoin continues to evolve and attract institutional interest, having access to high-performance mining equipment will remain a decisive factor in profitability.

Whether you're expanding an existing farm or entering the space strategically, the S21 XP Immersion offers compelling value—if sourced from a trusted provider at a fair price.

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