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Antminer S21 Hydro

Antminer S21 Hydro

Hashrate 335.0 TH/s Power 5,360 W Efficiency 16.0 J/TH
VS
Innosilicon T3 43T

Innosilicon T3 43T

Hashrate 43.0 TH/s Power 2,100 W Efficiency 48.8 J/TH

Antminer S21 Hydro vs Innosilicon T3 43T

Side-by-side specs, profitability, and home mining comparison.

Specifications Comparison

Antminer S21 Hydro Specification Innosilicon T3 43T
335.0 TH/s Hashrate 43.0 TH/s
5,360 W Power Consumption 2,100 W
16.0 J/TH Efficiency 48.8 J/TH
50 dB Noise Level —
15.8 kg Weight 10,000.0 kg
18,288 BTU/hr BTU Output 7,165 BTU/hr
44/100 Home Mining Score 26/100
— Release Year —
SHA-256 Algorithm SHA-256
Bitmain Manufacturer Innosilicon

Profitability Comparison

$/kWh

Antminer S21 Hydro

Daily Revenue 0.00015416 BTC $12.00
Daily Electricity -$12.86
Daily Profit -$0.86
Monthly -$25.82
Yearly -$314.15

Innosilicon T3 43T

Daily Revenue 0.00001979 BTC $1.54
Daily Electricity -$5.04
Daily Profit -$3.50
Monthly -$104.98
Yearly -$1,277.24

Based on BTC price of $77,862 and current network difficulty as of May 16, 2026. Actual results vary.

Verdict

Our scoring model gives the nod to the Antminer S21 Hydro, which leads on 5 of 6 weighted factors (efficiency, hashrate, home mining score, noise level, price-performance). Where it pulls away hardest is 679% more hashrate (335.0 vs 43.0 TH/s). The Innosilicon T3 43T claws back ground on power consumption. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.

Winner: Antminer S21 Hydro — wins on 5 of 6 factors

Spec Deltas

Here is every spec where the Antminer S21 Hydro and Innosilicon T3 43T actually differ, with the gap quantified:

  • Antminer S21 Hydro 679% more hashrate (335.0 vs 43.0 TH/s)
  • Innosilicon T3 43T 61% better power draw (5,360 vs 2,100 W)
  • Antminer S21 Hydro 67% better efficiency (16.0 vs 48.8 J/TH)
  • Antminer S21 Hydro 100% better weight (15.8 vs 10,000.0 kg)
  • Antminer S21 Hydro 155% more heat output (18,288 vs 7,165 BTU/hr)
  • Antminer S21 Hydro 69% more home mining score (44.0 vs 26.0)

Cost & ROI Over Time

A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.

Antminer S21 Hydro Metric Innosilicon T3 43T
$9,500 Upfront cost (MSRP) $1,500
-$0.86 Daily net profit -$3.50
-$9,814 Net after 1 year -$2,777
-$10,128 Net after 2 years -$4,054
-$10,442 Net after 3 years -$5,332
Does not pay back at current rates (negative daily profit) Payback period Does not pay back at current rates (negative daily profit)

Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.

Best For...

Best for Profitability

Tie

Both miners produce similar daily profit.

Best for Home Mining

Antminer S21 Hydro

Score: 44/100. 50 dB noise level.

Best for Efficiency

Antminer S21 Hydro

16.0 J/TH — lower electricity cost per terahash.

Frequently Asked Questions

Antminer S21 Hydro vs Innosilicon T3 43T: which one earns more per day?

At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 Hydro is more profitable at $-0.86/day compared to $-3.50/day for the Innosilicon T3 43T. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

Is the Antminer S21 Hydro or the Innosilicon T3 43T better for noise-sensitive spaces?

The Antminer S21 Hydro is quieter at 50 dB compared to the Innosilicon T3 43T at 0 dB. For home mining, lower noise levels make a significant difference in livability.

Which is better for home mining, the Antminer S21 Hydro or Innosilicon T3 43T?

The Antminer S21 Hydro scores 44/100 on our Home Mining Score (vs 26/100 for the Innosilicon T3 43T). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.

How far apart are the Antminer S21 Hydro and Innosilicon T3 43T on J/TH?

The Antminer S21 Hydro runs at 16.0 J/TH while the Innosilicon T3 43T runs at 48.8 J/TH — a difference of 32.8 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 67% better efficiency (16.0 vs 48.8 J/TH).

Compare Antminer S21 Hydro with...

Compare Innosilicon T3 43T with...

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