Bitmain Antminer S21+

Bitmain Antminer S21 Series – Hydro & Immersion-Cooled ASIC Miners for High-Efficiency Bitcoin Mining

Step into the future of Bitcoin mining with the Bitmain Antminer S21 Series, a premium lineup of advanced ASIC miners engineered for the SHA-256 algorithm, specifically targeting Bitcoin (BTC). With a range of models from 300Th/s to a staggering 500Th/s, this collection is optimized for industrial-scale operations that demand high hashrate, superior efficiency, and cutting-edge cooling technology.

Whether you’re deploying hydro-cooled units for noise reduction and thermal stability or utilizing immersion-cooled systems for long-term sustainability, the S21 Series delivers exceptional performance and reliability. Designed by Bitmain, the global leader in blockchain mining hardware, these miners represent the pinnacle of ASIC innovation and next-generation mining infrastructure.

💡 All Products Are In Stock & Available for Immediate Purchase

🔧 Explore the Models in the Antminer S21 Series:

🔹 1. Bitmain Antminer S21 XP+ Hyd – 500Th/s

The most powerful unit in the lineup, delivering 500Th/s at only 5500W, this model sets a new benchmark with ultra-efficient 11J/Th energy consumption. Its compact 3U rack-mount design and hydro cooling system make it ideal for enterprise-level operations where every watt and decibel matters.

• Cooling: Hydro (OD10)

• Size: 339 x 173 x 207 mm

• Noise Level: 50 dB

• Voltage: 380–415V

• Release: July 2025

🔹 2. Bitmain Antminer S21 XP Hyd – 473Th/s

A powerful and reliable choice for data centers, the 473Th model offers 12J/Th efficiency with hydro-cooling, striking a perfect balance between performance and power consumption.

• Cooling: Hydro

• Size: 410 x 170 x 209 mm

• Release: November 2024

🔹 3. Bitmain Antminer S21 XP Immersion – 300Th/s

Specifically designed for oil immersion cooling, this model is ideal for mining farms seeking quiet, low-maintenance, and scalable solutions. It runs at 13.5J/Th while producing minimal noise—perfect for facilities leveraging green and submerged mining environments.

• Cooling: Oil Immersion

• Size: 400 x 195 x 290 mm

• Release: October 2024

🔹 4. Bitmain Antminer S21 Hyd – 335Th/s

Released in early 2024, this model provides stable 335Th/s performance with hydro-cooling and energy consumption at 16J/Th, making it a solid, proven workhorse for mid-to-large scale mining farms.

• Cooling: Hydro

• Size: 410 x 170 x 209 mm

• Release: February 2024

🔹 5. Bitmain Antminer S21+ Hyd – 319Th/s

Combining compact size and efficient cooling, this model offers 319Th/s hashrate at 15J/Th—a smart choice for those seeking powerful performance with slightly lower power demands.

• Cooling: Hydro

• Size: 410 x 170 x 209 mm

• Release: February 2025

⚙️ Key Features Across All Models:

• ✅ SHA-256 Algorithm – Supports Bitcoin (BTC) and other compatible coins

• 🔋 Exceptional Energy Efficiency – As low as 11J/Th

• 💧 Hydro & Immersion Cooling Options – Minimize heat and noise, maximize lifespan

• 🔇 Ultra-Low Noise Levels – As low as 50dB

• 📦 Compact Rack-Ready Designs – Ideal for high-density deployments

• 🔧 Built for 24/7 Mining Operations – Industrial-grade durability

📦 Availability

All listed Bitmain Antminer S21 models are in stock and available now. Whether you’re upgrading your farm or expanding your operation, this series provides a scalable and future-proof solution for long-term BTC mining success.

| Purchasing Guidelines :

• This model is for In-stock and will be shipped no later than 1 Week.
• All sellers or vendors do not have in hand, because this is a Special Product.
• No more Fees, Shipping costs, custom fees and taxes are included in the retail price per unit.
• We provide DDP (Delivered Duty Paid) service to All countries except Palestine and North Korea.
• One account can purchase a maximum of 20 units.
• This model is for pre-order, if the hashrate is higher or lower than 20Ths at the time of shipment, the price will be refunded at $/T.

| Warranty :

1. 2 years Extended GEN CYCLESAFE™ is provided starting from the shipping date. We will cover shipping costs when shipping a replacement unit within the warranty period.
2. Warranty Period 2 years from the manufacturer
3. The warranty only applies to the original purchaser who purchased the machine directly from us .

| Shipping Details :

1. The products are made in China and send from china.
2. Shipments will be scheduled on a first-paid-first-ship basis for orders on which We has received full payment.
3. To ensure utmost security for our customers, the items get shipped from the dealerships to our storage first to undergo a quality control by our team. After the quality approval, we ship worldwide with DHL, FedEx and UPS.Always with full insurance, security bag and tracking number. Average delivery duration 4 days to 10 working days.

All sales final. No cancellations or returns. For volume pricing, consult a live chat agent or email.

Due to the high demand and low supply of these units on the market, in order to make sure your online ordered units are reserved, we will need to receive the payment confirmation within 24 hours of you placing the order online or your order will be cancelled.