Antminer S21 vs Antminer T21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 | Specification | Antminer T21 |
|---|---|---|
| 200.0 TH/s | Hashrate | 190.0 TH/s |
| 3,500 W | Power Consumption | 3,610 W |
| 17.5 J/TH | Efficiency | 19.0 J/TH |
| 75 dB | Noise Level | 75 dB |
| 14.6 kg | Weight | 14.6 kg |
| 11,942 BTU/hr | BTU Output | 12,317 BTU/hr |
| 36/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S21
Antminer T21
Based on BTC price of $78,278 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
The T21 is Bitmain's budget entry in the 21-series lineup, sharing the same generation platform as the S21 but at a lower performance and price tier.
The S21 outperforms the T21 in both hashrate and efficiency. However, the T21's lower price point makes it an attractive entry into current-gen mining for budget-conscious operators. The efficiency gap is smaller than in previous S/T generation comparisons.
Spec Deltas
The Antminer S21 and Antminer T21 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer S21 5% more hashrate (200 vs 190 TH/s)
- Antminer S21 3% better power draw (3,500 vs 3,610 W)
- Antminer S21 8% better efficiency (17.5 vs 19.0 J/TH)
- Antminer T21 3% more heat output (11,942 vs 12,317 BTU/hr)
- Antminer S21 20% more home mining score (36.0 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.
| Antminer S21 | Metric | Antminer T21 |
|---|---|---|
| $5,500 | Upfront cost (MSRP) | $4,200 |
| -$1.20 | Daily net profit | -$1.82 |
| -$5,936 | Net after 1 year | -$4,864 |
| -$6,373 | Net after 2 years | -$5,528 |
| -$6,809 | Net after 3 years | -$6,193 |
| 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 S21Score: 36/100. 75 dB noise level.
Best for Efficiency
Antminer S2117.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the T21 a good budget alternative to the S21?
Yes. The T21 offers current-generation efficiency at a lower price. It is ideal for miners who want modern hardware but have tighter budgets or are testing the waters before committing to the S21.
What is the efficiency difference between the S21 and T21?
The S21 typically runs around 17.5 J/TH while the T21 is around 19 J/TH. This roughly 8-10% gap means the S21 produces the same hashrate using less electricity.