Bitmain Antminer S21 Hyd (335Th) vs Antminer T21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Hyd (335Th) | Specification | Antminer T21 |
|---|---|---|
| 335.0 TH/s | Hashrate | 190.0 TH/s |
| 5,360 W | Power Consumption | 3,610 W |
| 16.0 J/TH | Efficiency | 19.0 J/TH |
| — | Noise Level | 75 dB |
| 14.2 kg | Weight | 14.6 kg |
| 18,288 BTU/hr | BTU Output | 12,317 BTU/hr |
| 16/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S21 Hyd (335Th)
Antminer T21
Based on BTC price of $79,078 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S21 Hyd (335Th) edges it: 3 of 6 factors go its way (efficiency, hashrate, price-performance). Its biggest concrete edge: 76% more hashrate (335 vs 190 TH/s). The Antminer T21 holds the edge in power consumption and home mining score and noise level. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer S21 Hyd (335Th) and Antminer T21 sit on each measurable spec:
- Bitmain Antminer S21 Hyd (335Th) 76% more hashrate (335 vs 190 TH/s)
- Antminer T21 33% better power draw (5,360 vs 3,610 W)
- Bitmain Antminer S21 Hyd (335Th) 16% better efficiency (16.0 vs 19.0 J/TH)
- Bitmain Antminer S21 Hyd (335Th) 3% better weight (14.2 vs 14.6 kg)
- Bitmain Antminer S21 Hyd (335Th) 48% more heat output (18,288 vs 12,317 BTU/hr)
- Antminer T21 88% more home mining score (16.0 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 S21 Hyd (335Th) | Metric | Antminer T21 |
|---|---|---|
| $3,999 | Upfront cost (MSRP) | $4,200 |
| -$0.29 | Daily net profit | -$1.53 |
| -$4,106 | Net after 1 year | -$4,760 |
| -$4,213 | Net after 2 years | -$5,320 |
| -$4,320 | Net after 3 years | -$5,880 |
| 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
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer T21Score: 30/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer S21 Hyd (335Th)16.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S21 Hyd (335Th) or the Antminer T21?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 Hyd (335Th) is more profitable at $-0.29/day compared to $-1.53/day for the Antminer T21. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer S21 Hyd (335Th) or the Antminer T21 better for noise-sensitive spaces?
The Antminer T21 is quieter at 75 dB compared to the Bitmain Antminer S21 Hyd (335Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Bitmain Antminer S21 Hyd (335Th) vs Antminer T21: which fits a residential setup better?
The Antminer T21 scores 30/100 on our Home Mining Score (vs 16/100 for the Bitmain Antminer S21 Hyd (335Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer S21 Hyd (335Th) vs Antminer T21: how much does the efficiency gap matter?
The Bitmain Antminer S21 Hyd (335Th) runs at 16.0 J/TH while the Antminer T21 runs at 19.0 J/TH — a difference of 3.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 16% better efficiency (16.0 vs 19.0 J/TH).