Bitmain Antminer S9 (12.5Th) vs Block Proto Rig
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S9 (12.5Th) | Specification | Block Proto Rig |
|---|---|---|
| 12.5 TH/s | Hashrate | 819.0 TH/s |
| 1,225 W | Power Consumption | 12,000 W |
| 98.0 J/TH | Efficiency | 14.7 J/TH |
| — | Noise Level | 80 dB |
| 4,200.0 kg | Weight | — |
| 4,180 BTU/hr | BTU Output | 40,944 BTU/hr |
| 31/100 | Home Mining Score | — |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Block Inc |
Profitability Comparison
Bitmain Antminer S9 (12.5Th)
Block Proto Rig
Based on BTC price of $79,029 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Block Proto Rig comes out ahead — it takes 3 of 5 (efficiency, hashrate, noise level). The standout gap is 6452% more hashrate (12.5 vs 819.0 TH/s) in the Block Proto Rig's favour. The Bitmain Antminer S9 (12.5Th) holds the edge in power consumption and home mining score. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Bitmain Antminer S9 (12.5Th) and Block Proto Rig diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Block Proto Rig 6452% more hashrate (12.5 vs 819.0 TH/s)
- Bitmain Antminer S9 (12.5Th) 90% better power draw (1,225 vs 12,000 W)
- Block Proto Rig 85% better efficiency (98.0 vs 14.7 J/TH)
- Block Proto Rig 880% more heat output (4,180 vs 40,944 BTU/hr)
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 S9 (12.5Th) | Metric | Block Proto Rig |
|---|---|---|
| $65 | Upfront cost (MSRP) | — |
| -$2.49 | Daily net profit | $0.99 |
| -$972 | Net after 1 year | +$360 |
| -$1,879 | Net after 2 years | +$719 |
| -$2,787 | Net after 3 years | +$1,079 |
| 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$3.47/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S9 (12.5Th)Score: 31/100. 0 dB noise level.
Best for Efficiency
Block Proto Rig14.7 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S9 (12.5Th) vs Block Proto Rig: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Block Proto Rig is more profitable at $0.99/day compared to $-2.49/day for the Bitmain Antminer S9 (12.5Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer S9 (12.5Th) or the Block Proto Rig better for noise-sensitive spaces?
The Block Proto Rig is quieter at 80 dB compared to the Bitmain Antminer S9 (12.5Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Bitmain Antminer S9 (12.5Th) vs Block Proto Rig: which fits a residential setup better?
The Bitmain Antminer S9 (12.5Th) scores 31/100 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 S9 (12.5Th) and Block Proto Rig?
The Bitmain Antminer S9 (12.5Th) runs at 98.0 J/TH while the Block Proto Rig runs at 14.7 J/TH — a difference of 83.4 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 85% better efficiency (98.0 vs 14.7 J/TH).