Equipment Catalog
Reference specifications and tuning viability notes for older flagship ASIC miners rated at 0.05 TH/s and above — the machines we assess most frequently.
Our reference database covers fourteen legacy models that South Korean operators still run in meaningful quantities. Below is a summary of the eight most common units we assess, with stock specifications and our general tuning viability rating.
| Model | Stock Hash Rate | Stock Power | Efficiency | Tuning Viability |
|---|---|---|---|---|
| Antminer S9 (14 TH/s) | 14.0 TH/s | 1,372 W | 98 J/TH | High — stable at 11–12 TH/s, ~950W |
| Antminer S9i (14 TH/s) | 14.0 TH/s | 1,320 W | 94 J/TH | High — improved PSU efficiency over S9 |
| Antminer S9j (14.5 TH/s) | 14.5 TH/s | 1,350 W | 93 J/TH | High — similar tuning profile to S9i |
| Whatsminer M20S (68 TH/s) | 68.0 TH/s | 3,360 W | 49 J/TH | Moderate — 58–62 TH/s at ~2,800W achievable |
| Whatsminer M21S (52 TH/s) | 52.0 TH/s | 3,520 W | 68 J/TH | Moderate — efficiency gains limited by PSU |
| AvalonMiner 1066 (50 TH/s) | 50.0 TH/s | 3,250 W | 65 J/TH | Moderate — firmware tuning more effective than voltage |
| AvalonMiner 1047 (37 TH/s) | 37.0 TH/s | 2,200 W | 59 J/TH | High for its class — often overlooked |
| Antminer T9+ (10.5 TH/s) | 10.5 TH/s | 1,433 W | 136 J/TH | Low — viable only with very cheap electricity |
How to Read Viability Ratings
High means we regularly achieve 15–25% power reduction with less than 8% hash-rate loss, and the tuned profile remains stable through summer ambient temperatures above 35°C.
Moderate means meaningful gains are possible but model-specific — some units respond well to firmware adjustments while others need hardware modifications (fan upgrades, thermal paste replacement) before tuning delivers results.
Low means the machine can be tuned, but break-even economics depend heavily on electricity rates below ₩80/kWh. We still assess these units when clients need documentation for decommissioning decisions.
Models Not Listed
We also maintain reference data for Antminer S17 (53 TH/s), Whatsminer M30S (86 TH/s), Innosilicon T2T-37T, and several other units above the 0.05 TH/s threshold. If your model is not listed, mention it in your inquiry — we will confirm whether it is in our database or requires a new-model research fee.
Quarterly Updates
Specifications and viability ratings are revised each quarter based on network difficulty changes and firmware releases. Last updated: August 2026.