S19a vs WhatsMiner M66S
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3450 W | 5513 W | |
| Release | 2021-11 | 2023-11 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $-2.48 | $1.77 | |
| Score | 55/100 | 68/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | S19a | WhatsMiner M66S | |
|---|---|---|---|
| SHA-256 | 100 TH/s3450 W · 28.99 GH/s/W | 298 TH/s5513 W · 54.05 GH/s/W |