Bitmain Antminer S3

Hashrate 478.0 GH/s Power 366 W Efficiency 765.7 J/TH

Bitdeer SealMiner A2

Hashrate 226.0 TH/s Power 3,730 W Efficiency 16.5 J/TH

Bitmain Antminer S3 vs Bitdeer SealMiner A2

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

Specifications Comparison

Bitmain Antminer S3	Specification	Bitdeer SealMiner A2
478.0 GH/s	Hashrate	226.0 TH/s
366 W	Power Consumption	3,730 W
765.7 J/TH	Efficiency	16.5 J/TH
—	Noise Level	75 dB
5,200.0 kg	Weight	15.5 kg
1,249 BTU/hr	BTU Output	12,727 BTU/hr
34/100	Home Mining Score	30/100
—	Release Year	—
SHA-256	Algorithm	SHA-256
Bitmain	Manufacturer	Bitdeer

Profitability Comparison

Electricity Rate:

$/kWh

Bitmain Antminer S3

Daily Revenue 0.00000022 BTC $0.02

Daily Electricity -$0.88

Daily Profit -$0.86

Monthly -$25.83

Yearly -$314.27

Bitdeer SealMiner A2

Daily Revenue 0.00010400 BTC $8.23

Daily Electricity -$8.95

Daily Profit -$0.73

Monthly -$21.77

Yearly -$264.92

Based on BTC price of $79,097 and current network difficulty as of May 15, 2026. Actual results vary.

Verdict

Weighing six performance factors, the Bitdeer SealMiner A2 comes out ahead — it takes 3 of 5 (efficiency, hashrate, noise level). Where it pulls away hardest is 47180% more hashrate (0.5 vs 226.0 TH/s). The Bitmain Antminer S3 claws back ground on power consumption and home mining score. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.

Winner: Bitdeer SealMiner A2 — wins on 3 of 5 factors

Spec Deltas

Here is every spec where the Bitmain Antminer S3 and Bitdeer SealMiner A2 actually differ, with the gap quantified:

Bitdeer SealMiner A2 47180% more hashrate (0.5 vs 226.0 TH/s)
Bitmain Antminer S3 90% better power draw (366 vs 3,730 W)
Bitdeer SealMiner A2 98% better efficiency (765.7 vs 16.5 J/TH)
Bitdeer SealMiner A2 100% better weight (5,200.0 vs 15.5 kg)
Bitdeer SealMiner A2 919% more heat output (1,249 vs 12,727 BTU/hr)
Bitmain Antminer S3 13% more home mining score (34.0 vs 30.0)

Cost & ROI Over Time

Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.

Bitmain Antminer S3	Metric	Bitdeer SealMiner A2
—	Upfront cost (MSRP)	$2,760
-$0.86	Daily net profit	-$0.73
-$314	Net after 1 year	-$3,025
-$629	Net after 2 years	-$3,290
-$943	Net after 3 years	-$3,555
—	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

Bitmain Antminer S3

Score: 34/100. 0 dB noise level.

Best for Efficiency

Bitdeer SealMiner A2

16.5 J/TH — lower electricity cost per terahash.

Frequently Asked Questions

Bitmain Antminer S3 vs Bitdeer SealMiner A2: which one earns more per day?

At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A2 is more profitable at $-0.73/day compared to $-0.86/day for the Bitmain Antminer S3. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

Bitmain Antminer S3 vs Bitdeer SealMiner A2: which runs at a lower noise level?

The Bitdeer SealMiner A2 is quieter at 75 dB compared to the Bitmain Antminer S3 at 0 dB. For home mining, lower noise levels make a significant difference in livability.

For mining at home, should I pick the Bitmain Antminer S3 or the Bitdeer SealMiner A2?

The Bitmain Antminer S3 scores 34/100 on our Home Mining Score (vs 30/100 for the Bitdeer SealMiner A2). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.

Bitmain Antminer S3 vs Bitdeer SealMiner A2: how much does the efficiency gap matter?

The Bitmain Antminer S3 runs at 765.7 J/TH while the Bitdeer SealMiner A2 runs at 16.5 J/TH — a difference of 749.2 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 98% better efficiency (765.7 vs 16.5 J/TH).

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