A21 vs KS2
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 1800 W | 1200 W | |
| Release | 2025-01 | 2023-09 | |
| Best opportunity |  NEXNetwork |  KASNetwork | |
| Profit/day | $4.84 | $-1.95 | |
| Score | 70/100 | 49/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | A21 | KS2 | |
|---|---|---|---|
| KHeavyHash | not supported | 2 TH/s1200 W · 1.667 GH/s/W | |
| NexaPoW | 3.4 GH/s1800 W · 1.889 MH/s/W | not supported |