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Bitmain Antminer S21 XP+ Hyd (500Th)

Bitmain Antminer S21 XP+ Hyd (500Th)

Hashrate 500.0 TH/s Power 5,500 W Efficiency 11.0 J/TH
VS

MicroBT WhatsMiner M78S

Hashrate 498.0 TH/s Power 6,723 W Efficiency 13.5 J/TH

Bitmain Antminer S21 XP+ Hyd (500Th) vs MicroBT WhatsMiner M78S

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

Specifications Comparison

Bitmain Antminer S21 XP+ Hyd (500Th) Specification MicroBT WhatsMiner M78S
500.0 TH/s Hashrate 498.0 TH/s
5,500 W Power Consumption 6,723 W
11.0 J/TH Efficiency 13.5 J/TH
50 dB Noise Level 75 dB
13.8 kg Weight 18.0 kg
18,766 BTU/hr BTU Output 22,939 BTU/hr
44/100 Home Mining Score 30/100
— Release Year —
SHA-256 Algorithm SHA-256
Bitmain Manufacturer MicroBT

Profitability Comparison

$/kWh

Bitmain Antminer S21 XP+ Hyd (500Th)

Daily Revenue 0.00023727 BTC $18.78
Daily Electricity -$13.20
Daily Profit $5.58
Monthly $167.48
Yearly $2,037.73

MicroBT WhatsMiner M78S

Daily Revenue 0.00023632 BTC $18.71
Daily Electricity -$16.14
Daily Profit $2.57
Monthly $77.17
Yearly $938.96

Based on BTC price of $79,161 and current network difficulty as of May 15, 2026. Actual results vary.

Verdict

Our scoring model gives the nod to the Bitmain Antminer S21 XP+ Hyd (500Th), which leads on 5 of 5 weighted factors (efficiency, hashrate, power consumption, home mining score, noise level). Its biggest concrete edge: 33% better noise (50.0 vs 75.0 dB). The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.

Winner: Bitmain Antminer S21 XP+ Hyd (500Th) — wins on 5 of 5 factors

Spec Deltas

Stripped to the numbers, this is how far apart the Bitmain Antminer S21 XP+ Hyd (500Th) and MicroBT WhatsMiner M78S sit on each measurable spec:

  • Bitmain Antminer S21 XP+ Hyd (500Th) 18% better power draw (5,500 vs 6,723 W)
  • Bitmain Antminer S21 XP+ Hyd (500Th) 19% better efficiency (11.0 vs 13.5 J/TH)
  • Bitmain Antminer S21 XP+ Hyd (500Th) 33% better noise (50.0 vs 75.0 dB)
  • Bitmain Antminer S21 XP+ Hyd (500Th) 23% better weight (13.8 vs 18.0 kg)
  • MicroBT WhatsMiner M78S 22% more heat output (18,766 vs 22,939 BTU/hr)
  • Bitmain Antminer S21 XP+ Hyd (500Th) 47% more home mining score (44.0 vs 30.0)

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.

Bitmain Antminer S21 XP+ Hyd (500Th) Metric MicroBT WhatsMiner M78S
$9,125 Upfront cost (MSRP) —
$5.58 Daily net profit $2.57
-$7,087 Net after 1 year +$939
-$5,049 Net after 2 years +$1,878
-$3,011 Net after 3 years +$2,817
Takes ~4.5 years to pay back at current rates Payback period —

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

Bitmain Antminer S21 XP+ Hyd (500Th)

$3.01/day higher profit at current rates.

Best for Home Mining

Bitmain Antminer S21 XP+ Hyd (500Th)

Score: 44/100. 50 dB noise level.

Best for Efficiency

Bitmain Antminer S21 XP+ Hyd (500Th)

11.0 J/TH — lower electricity cost per terahash.

Frequently Asked Questions

Which makes more money, the Bitmain Antminer S21 XP+ Hyd (500Th) or the MicroBT WhatsMiner M78S?

At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 XP+ Hyd (500Th) is more profitable at $5.58/day compared to $2.57/day for the MicroBT WhatsMiner M78S. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

Which is quieter, the Bitmain Antminer S21 XP+ Hyd (500Th) or MicroBT WhatsMiner M78S?

The Bitmain Antminer S21 XP+ Hyd (500Th) is quieter at 50 dB compared to the MicroBT WhatsMiner M78S at 75 dB. For home mining, lower noise levels make a significant difference in livability.

Bitmain Antminer S21 XP+ Hyd (500Th) vs MicroBT WhatsMiner M78S: which fits a residential setup better?

The Bitmain Antminer S21 XP+ Hyd (500Th) scores 44/100 on our Home Mining Score (vs 30/100 for the MicroBT WhatsMiner M78S). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.

Bitmain Antminer S21 XP+ Hyd (500Th) vs MicroBT WhatsMiner M78S: how much does the efficiency gap matter?

The Bitmain Antminer S21 XP+ Hyd (500Th) runs at 11.0 J/TH while the MicroBT WhatsMiner M78S runs at 13.5 J/TH — a difference of 2.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 19% better efficiency (11.0 vs 13.5 J/TH).

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Compare MicroBT WhatsMiner M78S with...

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