Bitmain Antminer L11 Pro (21GH)

Bitmain Antminer L11 Pro — Maximum hashrate for scrypt mining with Litecoin & Dogecoin

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The Bitmain Antminer L11 Pro is the most powerful air-cooled model in the current L11 series and offers around 21 GH/s (± 5%) of computing power with a power consumption of around 3900 watts. It thus achieves an energy efficiency of around 185 J/GH — while maintaining stable performance under full load.

The L11 Pro version is aimed at users who want to use maximum hashrate per device without switching to water-cooled infrastructure. It uses the same platform as the standard L11, but has higher-selected chips with an improved performance class (chip binning).

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Technical Classification and Performance Data

Like all models in the series, the L11 Pro is based on the Scrypt algorithm and is fully suitable for merged mining — Litecoin (LTC) and Dogecoin (DOGE) can be mined simultaneously without additional power consumption or configuration effort.

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Performance data at a glance:

• Computing power: approx. 21 GH/s (± 5%)
• Power consumption: approx. 3900 W
• Energy efficiency: approx. 185 J/GH
• Algorithm: Scrypt (Litecoin & Dogecoin)
• Merged mining: natively supported (AuxPow)
• Cooling: air-cooled, 4 temperature-controlled fans
• Connection: Ethernet/ bitmain interface

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Platform and operation — high stability air cooling

Despite higher computing power, the L11 Pro remains completely air-cooled. The design is based on the well-known bitmain form factor with four temperature-controlled fans and robust aluminum housing. Integration into existing mining infrastructure is possible without adjustments.

Important: Even with higher wattages, no conversion is necessary — as with other models, the power supply is provided by standardized C32 fuses at 230 V. The noise level is slightly increased, but is within the usual range of air-cooled ASICs.

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Classification within the L series

The Bitmain Antminer L11 Pro (21GH/s) forms together with Antminer L11 Standard (20GH/s) The air-cooled top group of current Bitmain scrypt miners. With around 1 GH/s more computing power, the L11 Pro is the most powerful model within the air-cooled L11 series — with an otherwise identical design and technology.

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An overview of the complete L series:

• L7 — first Scrypt model from Bitmain (since 2021), known for stable running performance
• L9 — second generation (since 2024) with higher hashrate and better efficiency
• L11 (20GH/s) — current generation (since 2026), standard model with high energy efficiency
• L11 Pro (21GH/s) — selected chip variant with higher computing power
• L11 Hydro (33GH/s) — water-cooled model for maximum thermal stability