Bitdeer Sealminers Better Than Bitmain Antminers?

Bitdeer Sealminers Better Than Bitmain Antminers?

In discussing hardware that offers superior performance and profitability in Bitcoin mining, two major devices have always found their way into the conversation being Bitdeer with its Sealminer series and Bitmain with its Antminer lineup.

Both brands have introduced next-generation ASIC miners that exceed the limits of power, efficiency, and output of other miners, but of these two, which one offers the better value in 2025?

This comprehensive comparison highlights recent models, including the Bitdeer Sealminer A2, A2 Pro (Air & Hydro), and Bitmain’s Antminer S21 series, with a focus on performance, cooling, profitability, innovation, and market reception.

Performance and Efficiency

If you have been in the mining space for quite some time now, you should already know the importance of hashrate and energy efficiency, and here is what our compared devices offer:

Bitdeer Sealminers

• Sealminer A2 (Air): 226 TH/s at 3,729W (16.5 J/TH)
• Sealminer A2 Pro Air: 255 TH/s at 3,790W (14.86 J/TH)
• Sealminer A2 Hydro: 446 TH/s at 7,360W (16.5 J/TH)
• Sealminer A2 Pro Hydro: 500 TH/s at 7,450W (14.9 J/TH)

Bitmain Antminers

• Antminer S21 (Air): 200 TH/s at 3,550W (17.75 J/TH)
• Antminer S21 XP Hydro: 500 TH/s at 5,500W (12 J/TH)
• Antminer S21e XP Hydro: Slightly lower efficiency (13 J/TH)

If the conversation is about air-cooled models, Bitdeer’s Sealminer A2 and A2 Pro outperform Bitmain’s S21, both in hashrate and energy efficiency. The Bitdeer SealMiner A2 Pro Air’s efficiency makes it more attractive for those operating in regions with high electricity costs.

Looking at the hydro-cooled category, Bitmain’s S21 XP Hydro possesses an efficiency of 12 J/TH, but Bitdeer’s A2 Pro Hydro, with its 500 TH/s output and 14.9 J/TH, is ideal.

Cooling, Noise, and Deployment

A miner cooling technology system explains how long it would last, the noise level, and flexibility in deployment, and here is how the two brands are compared:

Bitdeer Sealminers

• Hydro models operate at 50 dB, making them suitable for large-scale mining operations where noise is a concern.
• Air-cooled models like the A2 Pro Air reach noise levels of 75 dB.

Bitmain Antminers

• Hydro versions of the Antminer S21 series also maintain a low noise of about 50 dB.
• Air-cooled models are equally noisy and offer no significant advantage over Bitdeer’s Sealminer models.

Bitdeer’s models provide flexibility for both air and hydro-cooled, which allows miners to choose based on their infrastructure and scale. For home setups, the air-cooled Bitdeer Sealminer A2 Pro is easier to deploy.

Profitability and ROI

How are both brands profitable? If you are wondering about that, we are also doing the same, hence let’s quickly check it out for ourselves, just as detailed below:

• Sealminer A2 (Air): $7/day net profit at $0.06/kWh
  ROI in approximately 441 days
• Antminer S21 (Air): $6/day net profit at similar rates
  ROI in approximately 519 days
• Sealminer A2 Pro Air: $8.32/day net profit at $0.045/kWh
• Sealminer A2 Pro Hydro: $16.40/day net profit at $0.045/kWh
• Sealminer A2 Hydro: $13.86/day net profit at $0.045/kWh

Bitdeer’s models deliver higher daily profits and shorter ROI periods, especially when electricity costs are optimized. Like the Bitdeer SealMiner A2 Pro Air, which is a notable top performer, is recommended for those seeking fast payback and lower entry costs.

Innovation and Transparency

Bitdeer has a strong grounding in research, innovation, and transparency. The company openly shares its development, manufacturing processes, and technology advancements, something which Bitmain has not done.

• Bitdeer’s Sealminer series is built on in-house 4 nm ASICs, representing cutting-edge chip technology.
• The leadership of Jihan Wu, a crypto mining figure, gives Bitdeer an advantage.
• Public discussions on platforms like Reddit trust Bitdeer’s transparency and innovation, with some users calling Bitdeer “the Nvidia of Bitcoin mining.”

Market Adoption and Community Feedback

There is no doubt that Bitmain is globally distributed and has a mature ecosystem of firmware and parts, but Bitdeer is growing as well. Early users of Sealminers are giving positive feedback on higher profitability, reliability, and straight design.

Bitdeer also has hosting services, which makes it convenient for miners who prefer outsourcing hardware management, giving them an upper hand when market competition is being discussed.

Conclusion: Sealminer or Antminer?

Bitdeer’s Sealminer A2 series has advantages in efficiency, profitability, and flexibility, particularly in the air-cooled system, while Bitmain’s Antminers are a reliable and efficient option, especially in hydro-cooled environments.

In short, if you are looking for a better air-cooled system and ROI, we recommend Bitdeer Sealminer A2 Pro Air and Bitdeer Antminer A2 Pro Hydro for high-output hydro operations.

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