Bitmain Antminer S15 (28Th) vs Block Proto Rig
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S15 (28Th) | Specification | Block Proto Rig |
|---|---|---|
| 28.0 TH/s | Hashrate | 819.0 TH/s |
| 1,596 W | Power Consumption | 12,000 W |
| 57.0 J/TH | Efficiency | 14.7 J/TH |
| — | Noise Level | 80 dB |
| 7,000.0 kg | Weight | — |
| 5,446 BTU/hr | BTU Output | 40,944 BTU/hr |
| 28/100 | Home Mining Score | — |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Block Inc |
Profitability Comparison
Bitmain Antminer S15 (28Th)
Block Proto Rig
Based on BTC price of $77,932 and current network difficulty as of May 21, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Block Proto Rig edges it: 3 of 5 factors go its way (efficiency, hashrate, noise level). Its biggest concrete edge: 2825% more hashrate (28.0 vs 819.0 TH/s). The Bitmain Antminer S15 (28Th) claws back ground on power consumption and home mining score. Cross-check the spec deltas and operating-cost table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Bitmain Antminer S15 (28Th) and Block Proto Rig actually differ, with the gap quantified:
- Block Proto Rig 2825% more hashrate (28.0 vs 819.0 TH/s)
- Bitmain Antminer S15 (28Th) 87% better power draw (1,596 vs 12,000 W)
- Block Proto Rig 74% better efficiency (57.0 vs 14.7 J/TH)
- Block Proto Rig 652% more heat output (5,446 vs 40,944 BTU/hr)
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 S15 (28Th) | Metric | Block Proto Rig |
|---|---|---|
| $5,599 | Upfront cost (MSRP) | — |
| -$2.83 | Daily net profit | $0.57 |
| -$6,631 | Net after 1 year | +$209 |
| -$7,662 | Net after 2 years | +$417 |
| -$8,694 | Net after 3 years | +$626 |
| 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
Block Proto Rig$3.40/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S15 (28Th)Score: 28/100. 0 dB noise level.
Best for Efficiency
Block Proto Rig14.7 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S15 (28Th) or the Block Proto Rig?
At the current BTC price and a $0.10/kWh electricity rate, the Block Proto Rig is more profitable at $0.57/day compared to $-2.83/day for the Bitmain Antminer S15 (28Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S15 (28Th) or Block Proto Rig?
The Block Proto Rig is quieter at 80 dB compared to the Bitmain Antminer S15 (28Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Bitmain Antminer S15 (28Th) vs Block Proto Rig: which fits a residential setup better?
The Bitmain Antminer S15 (28Th) scores 28/100 on our Home Mining Score (vs 0/100 for the Block Proto Rig). 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 Bitmain Antminer S15 (28Th) and Block Proto Rig?
The Bitmain Antminer S15 (28Th) runs at 57.0 J/TH while the Block Proto Rig runs at 14.7 J/TH — a difference of 42.4 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 74% better efficiency (57.0 vs 14.7 J/TH).