Antminer S21 Series

The Bitmain Antminer S21 family covers air-cooled models (S21, S21 Pro, S21+, S21 XP), hydro-cooled models (S21 Hyd, S21+ Hyd, S21 XP Hyd, S21e Hyd) and immersion models. Hydro and immersion units need a matching liquid-cooling setup, while air-cooled units need strong airflow and noise management. Hashrate, power and efficiency for each unit are listed on its product page.78 models in stock, priced from $576 to $22,154. New condition, flat-rate US shipping of $120 per order, a 30-day limited warranty and 20-day returns. Mining results depend on electricity costs, network difficulty and coin prices; Bitminers does not guarantee profitability. See our shipping, warranty and returns policies.Guides: Best ASIC miners compared · Profitability calculator