ZoneBitcoin EditorialA new generation of hydro-cooled ASICs, signed Bitmain has become a new benchmark in terms of mining. The Antminer S21e XP Hydro 3U, able to reach 860 TH/s while remaining in a compact 3U chassis.
Highly appreciated by miners who do host-mining, the Antminer s21 currently allows you to bring in about $40 per day to their owners. You can opt for host mining services like Oneminers for example to take advantage of these offers.
Please note, however, that the returns displayed depend on many factors (electricity and the price of bitcoin, among others) at the time you read this article.
Datasheet — When power meets efficiency
- Hashrat to : 860 TH/s
- Power Consumption : 11 180 W
- Energy Efficiency : ~13 J/TH
- Size : 900 × 486 × 132mm; weight ≈ 18 kg
- Noise : approximately 50 dB
- Format : 3U rack, ideal for professional farms
- Cooling : hydro circuit with approximately 16–20 L/min
Hydro-cooling 💧: expertise and performance
This model is an advanced version of the water-cooled Antminer (S19 XP Hydro, S21 XP Hydro). Water flows closer to the ASIC chips, improving thermal stability, reducing wear, and enabling higher hash density.
Result: better cooling, more efficient — without an explosion in consumption.
Profitability: practical calculations (June 2025)
According to WhatToMine, this rig can generate between $45 and $48 gross income per day ; after electricity costs (~$0,12/kWh), the net profit is estimated at between $18–$21 per day, or an estimated return on investment of approximately 22 months.
These numbers vary depending on the price of BTC, network difficulty, and the cost of electricity.
Comparison with previous models
- S21 XP Hydro : 473 TH/s for 5 W (~676 J/TH)
- S21e XP Hydro 3U : 860 TH/s for 11 W (~180 J/TH)
Despite a slightly less favorable ratio in J/TH, the 3U model offers almost double the computing power in a single unit – a major asset for densifying farms.
This miner is designed for:
- Professional mining farms : optimization of density and yield.
- Industrial infrastructure with existing water circuits: more stability, less wear.
- Energy producers wishing to enhance their surplus through mining.
He's less suitable to “home miners” because of its requirements: high power and complex cooling system.
Characteristics documents
- Infrastructure to be planned : water circuits (antifreeze, controlled pressure), suitable premises.
- Weight and handling : easily stackable in rack, but requires good support.
- Thermal management : pay attention to the overall evacuation of heat.
Bitmain appears to be focusing on efficiency rather than just raw power. Hydro-cooling not only allows for better performance, but also increased longevity of the machines.
→ A sign that we are entering an era where the durability matters almost as much as power.
| Asset | Details |
|---|---|
| Gross return | 860 TH/s in a 3U format |
| Energy Efficiency | 13 J/TH, close to the best standards |
| Hydro-cooling | Optimal cooling, enhanced reliability |
| ROI | ~22–24 months under typical conditions |
| Target users | Professional farms, farms, energy producers |
In conclusion
Le Bitmain Antminer S21e XP Hydro 3U marks a new milestone: immense performance for a compact machine, in a pro format designed for modern mining farms.
The return on investment is solid, provided you have good electrical and hydraulic infrastructure. For both large and very large operators, this offering is a strategic technological tool.
