Bitmain Antminer A3 (815Gh)

Hashrate 815.0 GH/s Power 1,275 W Efficiency 1,564.4 J/TH

Innosilicon S11 SiaMaster

Hashrate 4.3 TH/s Power 1,350 W Efficiency 314.0 J/TH

Bitmain Antminer A3 (815Gh) vs Innosilicon S11 SiaMaster

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

Specifications Comparison

Bitmain Antminer A3 (815Gh)	Specification	Innosilicon S11 SiaMaster
815.0 GH/s	Hashrate	4.3 TH/s
1,275 W	Power Consumption	1,350 W
1,564.4 J/TH	Efficiency	314.0 J/TH
—	Noise Level	—
4,200.0 kg	Weight	3,700.0 kg
4,350 BTU/hr	BTU Output	4,606 BTU/hr
31/100	Home Mining Score	31/100
—	Release Year	—
Blake2b	Algorithm	Blake2b
Bitmain	Manufacturer	Innosilicon

Profitability Comparison

Electricity Rate:

$/kWh

Bitmain Antminer A3 (815Gh)

Daily Revenue 0.00000038 BTC $0.03

Daily Electricity -$3.06

Daily Profit -$3.03

Monthly -$90.92

Yearly -$1,106.19

Innosilicon S11 SiaMaster

Daily Revenue 0.00000198 BTC $0.15

Daily Electricity -$3.24

Daily Profit -$3.09

Monthly -$92.55

Yearly -$1,126.08

Based on BTC price of $78,257 and current network difficulty as of May 16, 2026. Actual results vary.

Verdict

Our scoring model gives the nod to the Innosilicon S11 SiaMaster, which leads on 3 of 4 weighted factors (efficiency, hashrate, price-performance). Its biggest concrete edge: 428% more hashrate (0.8 vs 4.3 TH/s). The Bitmain Antminer A3 (815Gh) claws back ground on power consumption. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.

Winner: Innosilicon S11 SiaMaster — wins on 3 of 4 factors

Spec Deltas

Here is every spec where the Bitmain Antminer A3 (815Gh) and Innosilicon S11 SiaMaster actually differ, with the gap quantified:

Innosilicon S11 SiaMaster 428% more hashrate (0.8 vs 4.3 TH/s)
Bitmain Antminer A3 (815Gh) 6% better power draw (1,275 vs 1,350 W)
Innosilicon S11 SiaMaster 80% better efficiency (1,564 vs 314 J/TH)
Innosilicon S11 SiaMaster 12% better weight (4,200 vs 3,700 kg)
Innosilicon S11 SiaMaster 6% more heat output (4,350 vs 4,606 BTU/hr)

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.

Bitmain Antminer A3 (815Gh)	Metric	Innosilicon S11 SiaMaster
$29,718	Upfront cost (MSRP)	$2,000
-$3.03	Daily net profit	-$3.09
-$30,824	Net after 1 year	-$3,126
-$31,930	Net after 2 years	-$4,252
-$33,037	Net after 3 years	-$5,378
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

Tie

Both miners are equally suitable for home use.

Best for Efficiency

Innosilicon S11 SiaMaster

314.0 J/TH — lower electricity cost per terahash.

Frequently Asked Questions

Which makes more money, the Bitmain Antminer A3 (815Gh) or the Innosilicon S11 SiaMaster?

At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer A3 (815Gh) is more profitable at $-3.03/day compared to $-3.09/day for the Innosilicon S11 SiaMaster. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

Which is quieter, the Bitmain Antminer A3 (815Gh) or Innosilicon S11 SiaMaster?

Both miners have similar noise levels. Check the specs table above for exact decibel readings.

For mining at home, should I pick the Bitmain Antminer A3 (815Gh) or the Innosilicon S11 SiaMaster?

Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.

How far apart are the Bitmain Antminer A3 (815Gh) and Innosilicon S11 SiaMaster on J/TH?

The Bitmain Antminer A3 (815Gh) runs at 1,564.4 J/TH while the Innosilicon S11 SiaMaster runs at 314.0 J/TH — a difference of 1,250.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 80% better efficiency (1,564 vs 314 J/TH).

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