Antminer S19j

Hashrate 90.0 TH/s Power 3,100 W Efficiency 34.4 J/TH

Bitdeer SealMiner A3 Hydro

Hashrate 500.0 TH/s Power 6,750 W Efficiency 13.5 J/TH

Antminer S19j vs Bitdeer SealMiner A3 Hydro

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

Specifications Comparison

Antminer S19j	Specification	Bitdeer SealMiner A3 Hydro
90.0 TH/s	Hashrate	500.0 TH/s
3,100 W	Power Consumption	6,750 W
34.4 J/TH	Efficiency	13.5 J/TH
75 dB	Noise Level	50 dB
13.0 kg	Weight	20.5 kg
10,577 BTU/hr	BTU Output	23,031 BTU/hr
84/100	Home Mining Score	44/100
—	Release Year	—
SHA-256	Algorithm	SHA-256
Bitmain	Manufacturer	Bitdeer

Profitability Comparison

Electricity Rate:

$/kWh

Antminer S19j

Daily Revenue 0.00004271 BTC $3.38

Daily Electricity -$7.44

Daily Profit -$4.06

Monthly -$121.75

Yearly -$1,481.24

Bitdeer SealMiner A3 Hydro

Daily Revenue 0.00023727 BTC $18.79

Daily Electricity -$16.20

Daily Profit $2.59

Monthly $77.63

Yearly $944.55

Based on BTC price of $79,182 and current network difficulty as of May 15, 2026. Actual results vary.

Verdict

Our scoring model gives the nod to the Bitdeer SealMiner A3 Hydro, which leads on 4 of 6 weighted factors (efficiency, hashrate, noise level, price-performance). Where it pulls away hardest is 456% more hashrate (90.0 vs 500.0 TH/s). The Antminer S19j claws back ground on power consumption and home mining score. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.

Winner: Bitdeer SealMiner A3 Hydro — wins on 4 of 6 factors

Spec Deltas

The Antminer S19j and Bitdeer SealMiner A3 Hydro diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":

Bitdeer SealMiner A3 Hydro 456% more hashrate (90.0 vs 500.0 TH/s)
Antminer S19j 54% better power draw (3,100 vs 6,750 W)
Bitdeer SealMiner A3 Hydro 61% better efficiency (34.4 vs 13.5 J/TH)
Bitdeer SealMiner A3 Hydro 33% better noise (75.0 vs 50.0 dB)
Antminer S19j 37% better weight (13.0 vs 20.5 kg)
Bitdeer SealMiner A3 Hydro 118% more heat output (10,577 vs 23,031 BTU/hr)
Antminer S19j 91% more home mining score (84.0 vs 44.0)

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 S19j	Metric	Bitdeer SealMiner A3 Hydro
$2,000	Upfront cost (MSRP)	$6,650
-$4.06	Daily net profit	$2.59
-$3,481	Net after 1 year	-$5,705
-$4,962	Net after 2 years	-$4,761
-$6,444	Net after 3 years	-$3,816
Does not pay back at current rates (negative daily profit)	Payback period	Takes ~7.0 years to pay back at current rates

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

Bitdeer SealMiner A3 Hydro

$6.65/day higher profit at current rates.

Best for Home Mining

Antminer S19j

Score: 84/100. 75 dB noise level.

Best for Efficiency

Bitdeer SealMiner A3 Hydro

13.5 J/TH — lower electricity cost per terahash.

Frequently Asked Questions

Is the Antminer S19j or Bitdeer SealMiner A3 Hydro more profitable?

At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A3 Hydro is more profitable at $2.59/day compared to $-4.06/day for the Antminer S19j. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

Which is quieter, the Antminer S19j or Bitdeer SealMiner A3 Hydro?

The Bitdeer SealMiner A3 Hydro is quieter at 50 dB compared to the Antminer S19j at 75 dB. For home mining, lower noise levels make a significant difference in livability.

Which is better for home mining, the Antminer S19j or Bitdeer SealMiner A3 Hydro?

The Antminer S19j scores 84/100 on our Home Mining Score (vs 44/100 for the Bitdeer SealMiner A3 Hydro). 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 S19j and Bitdeer SealMiner A3 Hydro on J/TH?

The Antminer S19j runs at 34.4 J/TH while the Bitdeer SealMiner A3 Hydro runs at 13.5 J/TH — a difference of 20.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 61% better efficiency (34.4 vs 13.5 J/TH).

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