Antminer Bitmain S21 vs S21+ vs S21 Pro – What’s the difference?

Bitmain Antminer S21, S21+ and S21 Pro represent the top ASIC Bitcoin miners designed to meet the different needs of professional miners. Each model in this series has its own unique features, whether it's performance, energy efficiency, or target audience. In this article, we'll take a closer look at the S21+ and compare it to the standard S21 and premium S21 Pro to help you choose the best miner for your needs.

Product description: Bitmain Antminer S21+ 235T 3564W

Bitmain Antminer S21+ 235T 3564W: The New Standard in Bitcoin Mining

Bitmain The Antminer S21+ 235T 3564W is an improved model from the S21 series from the company Bitmain, designed for professionals looking for a balance between high performance and energy efficiency. This ASIC miner, released in early 2025, offers an impressive hash rate of 235 TH/s while consuming 3564 W, making it one of the most powerful SHA-256 Bitcoin mining devices. With an energy efficiency of 16,5 J/TH, the Antminer S21+ allows you to optimize electricity costs while maintaining a leading performance position.

Key Features of Antminer S21+ 235T

• Maximum performance: Hash rate 235 TH/s ensures high calculation speed, ideal for mining Bitcoin, Bitcoin Cash and other coins on SHA-256.
• Optimized energy efficiency: The value of 16,5 J/TH reduces electricity costs, which is especially important in the conditions of increasing network difficulty after the halving in 2024.
• Improved cooling system: It is equipped with four high-speed fans (140mm) to effectively dissipate heat and ensure stable operation at a noise level of 76dB. It is recommended to place it in a well-ventilated room or use soundproofing.
• Compactness and reliability: The dimensions of the device are 400 x 195 x 290 mm (without packaging) and the weight is 15,4 kg (net), making it suitable for placement on mining farms of any scale.
• Universality of operating conditions: It operates at temperatures from 0°C to 45°C and humidity from 10–90%, allowing it to adapt to different climatic conditions.

Technical Specifications

• Algorithm: SHA-256
• Hash rate: 235 TH / s
• Power consumption: 3564 W
• Energy efficiency: 16,5 J/TH
• Tension: 220-277 V
• Interface: Ethernet (RJ45)
• Dimensions: 400 x 195 x 290 mm (without packaging)
• Weight: 15,4 kg (net), 22,9 kg (gross)
• Noise level: 76 dB
• Fans: 4 (140mm, 4-pin)
• Operating temperature: 0 ° C - 45 ° C
• Guarantee: 1 year (when purchased through official distributors)

Why choose Antminer S21+ 235T?

Antminer S21 + The 235T stands out from the competition thanks to the use of advanced 5nm chips, which provide 17% higher energy efficiency compared to the standard S21 model. This device is ideal for miners who strive for high performance without a significant increase in electricity costs. The model supports stable operation even under high loads, and the built-in power supply unit (PSU) along with the cable (P13-C20) make installation easy. For those planning long-term investments in mining, the S21+ will become a reliable partner and provide a competitive advantage in 2025.

Recommendations for operation

• Place the miner in a cool room with a temperature of 10–20°C for maximum performance.
• Use a quality power cord (16A, C19) for stable operation.
• Clean dust from fans regularly to prevent overheating and extend the life of the device.
• To reduce noise, consider using immersion cooling or placing in an insulated room.

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Bitmain The Antminer S21+ 235T 3564W is a combination of performance, efficiency and reliability, created for modern miners. Whether you are a beginner or a seasoned professional, this miner will help you maximize your Bitcoin mining income. Order the Antminer S21+ today and become part of the future of cryptocurrency mining!

Antminer Bitmain S21 vs S21+ vs S21 Pro – What’s the difference?

Now let’s clarify why this model is called Antminer S21+ and how it differs from the standard version (S21) and the Pro version (S21 Pro). I have analyzed the available data to highlight the key differences.

1. Why the “+” version?

• Improved performance: Antminer S21 + is an improvement over the standard S21 model that was released earlier. The main difference of the “+” version lies in the increased hash rate and better energy efficiency. The S21+ was introduced in early 2025 (according to information from the Internet, for example, on asicminervalue.com and cryptominerbros.com) as an intermediate step between the standard S21 and the more powerful S21 Pro.
• Positioning: The “+” version is intended for miners who want higher performance than the standard S21 but are not ready to upgrade to the S21 Pro, which can be more expensive or more demanding to operate due to power and cooling requirements.

2. Comparison with other versions

3. Differences between models

• Antminer S21 (Standard):
  • Hash rate: 200 TH/s, consumption 3500 W, energy efficiency 17,5 J/TH.
  • This is the entry-level model of the S21 series, released in early 2024. It is aimed at miners who need stable performance at an affordable price.
  • Suitable for beginners and medium farms, but less effective in conditions of increasing network difficulty after the halving in 2024.
• Antminer S21+:
  • Hash rate: Versions available with 216 TH/s, 225 TH/s and 235 TH/s, consumption 3564 W, energy efficiency 16,5 J/TH.
  • The “+” version increases performance by 8-17% compared to the standard S21 (for example, 235 TH/s versus 200 TH/s). This is achieved through chip and firmware optimizations.
  • Energy efficiency is improved (16,5 J/TH versus 17,5 J/TH), reducing electricity costs.
  • The S21+ is positioned as a more powerful alternative to the S21, but less extreme than the S21 Pro. It was released later (February 2025), so it is more modern than the S21.
• Antminer S21 Pro:
  • Hash rate: 234 TH/s, consumption 3510 W, energy efficiency 15 J/TH.
  • The S21 Pro is the premium version, released in July 2024 (according to viperatech.com). It offers better energy efficiency (15 J/TH), making it more economical in the long run.
  • Compared to the S21+, the Pro version has a slightly lower hash rate (234 TH/s vs. 235 TH/s) but better energy efficiency (15 J/TH vs. 16,5 J/TH), which may be more important for large farms with high electricity tariffs.
  • The Pro version is intended for professionals who are prepared for higher costs for maximum optimization.

4. Why is the S21+ considered a “plus” version?

• Feature improvements: The S21+ has a higher hash rate (up to 235 TH/s) compared to the standard S21 (200 TH/s), making it a more powerful device.
• Optimalization: Better energy efficiency (16,5 J/TH) compared to S21 (17,5 J/TH) allows for savings on electricity.
• Intermediate level: The S21+ fills the gap between the entry-level S21 and the premium S21 Pro, offering a balance between price, performance, and energy efficiency.
• Modernity: A February 2025 release (according to cryptominerbros.com) means that S21+ includes the latest updates and improvements from Bitmain, adapted to current market conditions.

5. Comparison Summary

• S21 – a basic model for starters, affordable and reliable, but less efficient.
• S21 + – an improved version with an emphasis on increased hash rate (235 TH/s) and energy efficiency (16,5 J/TH), suitable for experienced miners who want more performance without moving to the premium segment.
• S21 Pro – a premium model with better energy efficiency (15 J/TH) but a slightly lower hash rate (234 TH/s), designed for professionals with large farms.