Bitmain T21 (190TH) vs MicroBT WhatsMiner M79
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain T21 (190TH) | Specification | MicroBT WhatsMiner M79 |
|---|---|---|
| 190.0 TH/s | Hashrate | 920.0 TH/s |
| 3,610 W | Power Consumption | 13,340 W |
| 19.0 J/TH | Efficiency | 14.5 J/TH |
| 76 dB | Noise Level | 50 dB |
| 16.4 kg | Weight | 37.0 kg |
| 12,317 BTU/hr | BTU Output | 45,516 BTU/hr |
| 23/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain T21 (190TH)
MicroBT WhatsMiner M79
Based on BTC price of $79,248 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the MicroBT WhatsMiner M79 edges it: 4 of 5 factors go its way (efficiency, hashrate, home mining score, noise level). The standout gap is 384% more hashrate (190 vs 920 TH/s) in the MicroBT WhatsMiner M79's favour. The Bitmain T21 (190TH) holds the edge in power consumption. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain T21 (190TH) and MicroBT WhatsMiner M79 sit on each measurable spec:
- MicroBT WhatsMiner M79 384% more hashrate (190 vs 920 TH/s)
- Bitmain T21 (190TH) 73% better power draw (3,610 vs 13,340 W)
- MicroBT WhatsMiner M79 24% better efficiency (19.0 vs 14.5 J/TH)
- MicroBT WhatsMiner M79 34% better noise (76.0 vs 50.0 dB)
- Bitmain T21 (190TH) 56% better weight (16.4 vs 37.0 kg)
- MicroBT WhatsMiner M79 270% more heat output (12,317 vs 45,516 BTU/hr)
- MicroBT WhatsMiner M79 91% more home mining score (23.0 vs 44.0)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Bitmain T21 (190TH) | Metric | MicroBT WhatsMiner M79 |
|---|---|---|
| $1,700 | Upfront cost (MSRP) | — |
| -$1.52 | Daily net profit | $2.58 |
| -$2,254 | Net after 1 year | +$943 |
| -$2,809 | Net after 2 years | +$1,885 |
| -$3,363 | Net after 3 years | +$2,828 |
| Does not pay back at current rates (negative daily profit) | 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
MicroBT WhatsMiner M79$4.10/day higher profit at current rates.
Best for Home Mining
MicroBT WhatsMiner M79Score: 44/100. 50 dB noise level.
Best for Efficiency
MicroBT WhatsMiner M7914.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain T21 (190TH) or MicroBT WhatsMiner M79 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M79 is more profitable at $2.58/day compared to $-1.52/day for the Bitmain T21 (190TH). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain T21 (190TH) or MicroBT WhatsMiner M79?
The MicroBT WhatsMiner M79 is quieter at 50 dB compared to the Bitmain T21 (190TH) at 76 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain T21 (190TH) or MicroBT WhatsMiner M79?
The MicroBT WhatsMiner M79 scores 44/100 on our Home Mining Score (vs 23/100 for the Bitmain T21 (190TH)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Bitmain T21 (190TH) and MicroBT WhatsMiner M79 on J/TH?
The Bitmain T21 (190TH) runs at 19.0 J/TH while the MicroBT WhatsMiner M79 runs at 14.5 J/TH — a difference of 4.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 24% better efficiency (19.0 vs 14.5 J/TH).