Energy efficiency
15.0 J/TH
4,785 W ÷ 319 TH/s
#38 of 99 in the catalog
ASIC miner · Bitmain Sold by manufacturer: yes
Bitmain Antminer S21+ Hyd
A hydro-cooled Bitcoin ASIC with 319 TH/s at 4,785 W — 15.0 J/TH.
About Antminer S21+ Hyd
The Antminer S21+ Hyd is Bitmain's hydro-cooled model, released in October 2024. At 15.0 J/TH it ranks #38 of 99 in the catalog by efficiency, and 20th of 33 among hydro-cooled machines.
With a water cooling loop and 4.8 kW it needs a hosting site or a data center. It comes in hashrate variants from 319 to 358 TH/s; this page uses the manufacturer's nominal 319 TH/s.
What the specs add up to
Derived from the specs below, with the formula on every card. Estimates, not a forecast
Electricity used per day
114.8 kWh
4.79 kW × 24 h
41.9 MWh a year
Electricity cost per day
$11.48
114.8 kWh × $0.10 per kWh
Break-even electricity price
$0.084 / kWh
Estimated daily reward ÷ electricity used per day
As of 13 Nov 2026
Built for
Data center
4.79 kW of heat
Home class: up to 50 dB and 1.4 kW, air cooling
Hashrate per kW
66.7 TH/s
319 TH/s ÷ 4.79 kW
Antminer S21+ Hyd or a digital miner with the same 319 TH/s
Same hashrate, side by side. Scenario: you run the machine yourself, on household electricity. Numbers follow our reward calculator and update daily
BTC price · 13 Nov 2026$70,780
Antminer S21+ Hyd
Your own machine · 319 TH/s · 15.0 J/TH
- Upfront cost
- Not shownNot in the catalog yet — see the manufacturer's store
- Reward per day (est.)
- 0.00014 BTC≈ $9.61 at the same hashrate
- Running cost per day
- $11.484.79 kW × 24 h × $0.10 per kWh
- Net per day (est.)
- −$1.88At your electricity price
- Delivery and setup
- Shipping, customs, pool setup
- Noise and heat
- 4.79 kW of heat at your place
GoMining digital miner
319 TH/s · 15 J/TH · runs in our data centers
- Upfront cost
- $3,640319 TH × $11.41 per TH
- Reward per day (est.)
- 0.00014 BTC≈ $9.61
- Running cost per day
- $8.58Daily maintenance fee: electricity and service
- Net per day (est.)
- $1.03After the maintenance fee
- Delivery and setup
- Nothing to ship — runs in the app
- Noise and heat
- Nothing at your place
Break-even electricity price for this model: $0.084 per kWh. Above it, electricity costs more than the estimated reward
Estimates, not a forecast. Based on the BTC price, network difficulty and GoMining fees as of 13 Nov 2026; specs as published by the manufacturer. Assumes the machine runs 24/7 with no pool fee; industrial hosting is a different calculation. The digital miner's fee is shown before discounts. Mining rewards vary and are not guaranteed; they may fall below fees. Not investment advice. See terms
Antminer S21+ Hyd specifications
16 characteristics, each with its source and the date we checked it. Values are nominal, as published by the manufacturer
- Published spec
- Calculated by GoMining
- Not found
- Manufacturer
- Bitmain
- Model
- Antminer S21+ Hyd
- Algorithm
- SHA-256 (Bitcoin)
- Energy efficiency
- 15.0 J/TH
- Calculated
- Noise level
- —The manufacturer does not publish it
- Not found · 16 Oct 2026
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Frequently Asked Questions
Questions about this model. For everything else, head to the Help Center