Canaan AvalonMiner 921

Hashrate 20.0 TH/s Power 1,700 W Efficiency 85.0 J/TH

MicroBT WhatsMiner M78S

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

Canaan AvalonMiner 921 vs MicroBT WhatsMiner M78S

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

Specifications Comparison

Canaan AvalonMiner 921	Specification	MicroBT WhatsMiner M78S
20.0 TH/s	Hashrate	498.0 TH/s
1,700 W	Power Consumption	6,723 W
85.0 J/TH	Efficiency	13.5 J/TH
—	Noise Level	75 dB
—	Weight	18.0 kg
5,800 BTU/hr	BTU Output	22,939 BTU/hr
28/100	Home Mining Score	30/100
—	Release Year	—
SHA-256	Algorithm	SHA-256
Canaan	Manufacturer	MicroBT

Profitability Comparison

Electricity Rate:

$/kWh

Canaan AvalonMiner 921

Daily Revenue 0.00000920 BTC $0.73

Daily Electricity -$4.08

Daily Profit -$3.35

Monthly -$100.56

Yearly -$1,223.52

MicroBT WhatsMiner M78S

Daily Revenue 0.00022917 BTC $18.12

Daily Electricity -$16.14

Daily Profit $1.99

Monthly $59.67

Yearly $726.00

Based on BTC price of $79,086 and current network difficulty as of May 15, 2026. Actual results vary.

Verdict

Run the numbers across every spec and the MicroBT WhatsMiner M78S edges it: 4 of 5 factors go its way (efficiency, hashrate, home mining score, noise level). The standout gap is 2390% more hashrate (20.0 vs 498.0 TH/s) in the MicroBT WhatsMiner M78S's favour. The Canaan AvalonMiner 921 holds the edge in power consumption. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.

Winner: MicroBT WhatsMiner M78S — wins on 4 of 5 factors

Spec Deltas

Stripped to the numbers, this is how far apart the Canaan AvalonMiner 921 and MicroBT WhatsMiner M78S sit on each measurable spec:

MicroBT WhatsMiner M78S 2390% more hashrate (20.0 vs 498.0 TH/s)
Canaan AvalonMiner 921 75% better power draw (1,700 vs 6,723 W)
MicroBT WhatsMiner M78S 84% better efficiency (85.0 vs 13.5 J/TH)
MicroBT WhatsMiner M78S 295% more heat output (5,800 vs 22,939 BTU/hr)
MicroBT WhatsMiner M78S 7% more home mining score (28.0 vs 30.0)

Best For...

Best for Profitability

MicroBT WhatsMiner M78S

$5.34/day higher profit at current rates.

Best for Home Mining

MicroBT WhatsMiner M78S

Score: 30/100. 75 dB noise level.

Best for Efficiency

MicroBT WhatsMiner M78S

13.5 J/TH — lower electricity cost per terahash.

Frequently Asked Questions

Canaan AvalonMiner 921 vs MicroBT WhatsMiner M78S: which one earns more per day?

At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M78S is more profitable at $1.99/day compared to $-3.35/day for the Canaan AvalonMiner 921. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.

Canaan AvalonMiner 921 vs MicroBT WhatsMiner M78S: which runs at a lower noise level?

The MicroBT WhatsMiner M78S is quieter at 75 dB compared to the Canaan AvalonMiner 921 at 0 dB. For home mining, lower noise levels make a significant difference in livability.

Which is better for home mining, the Canaan AvalonMiner 921 or MicroBT WhatsMiner M78S?

The MicroBT WhatsMiner M78S scores 30/100 on our Home Mining Score (vs 28/100 for the Canaan AvalonMiner 921). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.

What is the efficiency difference between Canaan AvalonMiner 921 and MicroBT WhatsMiner M78S?

The Canaan AvalonMiner 921 runs at 85.0 J/TH while the MicroBT WhatsMiner M78S runs at 13.5 J/TH — a difference of 71.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 84% better efficiency (85.0 vs 13.5 J/TH).

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