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Testing our new inhouse s21 slim: a sound and efficient miner

New In-House S21 Slim Model | Addressing Power Efficiency and Noise Concerns

By

Gina Roberts

Jan 25, 2026, 09:41 PM

Edited By

Leo Zhang

2 minutes reading time

A miner testing setup showcasing the S21 Slim model with cooling fans and voltage settings displayed.

A new in-house S21 Slim model is getting attention after months of testing various voltages, aiming for optimal performance. While some users express concerns about fan noise and efficiency, others remain optimistic about its potential.

Efficiency Testing Results

Sources confirm that the testing phase successfully reached 42 TH/s at 680W on standard 110V power. Supply variations lead to differing hash rates, leaving some users hopeful yet cautious.

Additionally, there's talk of offering a turbo version utilizing stock 7000RPM fans, though the decision currently favors Noctua's NF-12 at 3000RPM.

"The noise level is similar to a desktop under heavy load," a representative stated, addressing volume concerns raised by users.

Community Reactions

The initial perks of this model draw mixed feedback:

  • Noise Concerns: Some users argue that even lower fan settings lead to increased noise levels. "The fans were much louder than expected," noted one participant.

  • Fan Performance: With Noctua fans, chatter indicates that they need a proper static pressure model for optimal efficiency.

  • Build Quality Woes: Comments hint at concerns about the fragility of the S21 series boards; users express that they may need more robust options.

Interestingly, chatter suggests a potential future enhancement: the ability to adjust PSU voltage on the fly, which could lead to better overclocking capabilities.

Should It Match Noctua Brown?

Curiously, a light-hearted debate has emerged on whether to paint the new model in Noctua brown, prompting a mix of playful responses from the community. Could this quirky choice boost interest or hinder appeal?

Key Insights

  • ๐Ÿ”‹ Achieved 42 TH/s at 680W in testing.

  • ๐ŸŽต Noise level equates to that of a typical desktop.

  • ๐Ÿ’ก Future upgrades may allow voltage adjustments for enhanced performance.

This blend of innovation and challenge presents an evolving scenario in the crypto mining community, reflecting users' diverse needs and expectations. The full impact on power efficiency and user satisfaction remains to be seen.

Looking Toward New Frontiers

Expectations are high for the S21 Slim as developers consider enhancing its features. Experts estimate around a 70% chance that future iterations will include adjustable PSU voltage, which could significantly boost efficiency and appeal. This decision may hinge on user feedback from early adopters, as many seek a miner that balances performance and noise. If these concerns are addressed, sales could surge, leading to an even broader market presence. The prospect of a turbo version also keeps the community engaged and hopeful for improvements.

Quirky Effects and Previous Trends

The discussion of whether to paint the S21 Slim in Noctua brown mirrors an unexpected moment in tech history when the Mercedez-Benz Smart car made waves by embracing an unconventional color scheme. Initially met with skepticism, those quirky colors eventually shaped identity and brand recognition, proving that even playful choices can sway customer interest. Just as the Smart car's bold design garnered attention and sparked debates, so too has the S21 Slim sparked discussions about its aesthetic potential, creating a unique blend of innovation and community engagement.