Understanding the 0.05 PH/s Threshold
0.05 petahash per second equals 50 terahash per second. Below this level, residential power limits and cooling constraints often make professional deployment impractical. Above it, operators face decisions about PDU sizing, rack density, and whether to colocate or self-host.
This guide covers hardware we have bench-tested for continuous workloads in South Korean ambient conditions (15–35°C seasonal range).
Equipment Comparison
| Model | Rated Hash Rate | Power Draw | Efficiency (J/TH) | 24/7 Suitability |
|---|---|---|---|---|
| Antminer S19 Pro | 0.11 PH/s (110 TH/s) | 3,250 W | 29.5 | Proven — high parts availability in Korea |
| Antminer S21 | 0.20 PH/s (200 TH/s) | 3,550 W | 17.5 | Excellent — best efficiency for industrial rates |
| Whatsminer M50S | 0.13 PH/s (126 TH/s) | 3,276 W | 26.0 | Good — verify firmware version before purchase |
| Whatsminer M60S | 0.19 PH/s (186 TH/s) | 3,422 W | 18.5 | Excellent — runs cooler than M50 generation |
| Avalon A1466 | 0.17 PH/s (170 TH/s) | 3,150 W | 18.5 | Good — smaller service network in Korea |
| Antminer S19j Pro | 0.10 PH/s (104 TH/s) | 3,060 W | 29.5 | Proven — common in sub-0.15 PH/s deployments |
Selection Criteria for 24/7 Workloads
Power Efficiency
At industrial electricity rates above ₩120/kWh, joules per terahash matter more than upfront unit cost. The S21 and M60S generations justify their price premium when you model a 36-month operation window.
Cooling Headroom
Units rated at 29+ J/TH run hotter per terahash of output. In facilities without precision HVAC, we recommend staying below 22 J/TH unless you have verified intake temperatures under 28°C year-round.
Parts Availability
Bitmain and MicroBT maintain service centres in South Korea with reasonable hash board lead times. Canaan Avalon boards typically require longer shipping from overseas distributors.
Noise Profile
Stock fans on S19-generation units exceed 75 dB at one metre. Semi-residential deployments should budget for fan upgrades or acoustic enclosures — factor ₩80,000–₩150,000 per unit.
Fleet Sizing Quick Reference
| Target Hash Rate | Approximate Unit Count (S21) | Minimum PDU Capacity |
|---|---|---|
| 0.05 PH/s | 1 unit (with headroom) | 20A dedicated circuit |
| 0.10 PH/s | 1 unit | 20A dedicated circuit |
| 0.25 PH/s | 2 units | 2× 30A circuits |
| 0.50 PH/s | 3 units | 3× 30A circuits |
| 1.00 PH/s | 5 units | Dedicated 100A panel recommended |
Figures assume S21 at 0.20 PH/s per unit. Adjust proportionally for other models.
When to Request a Custom Shortlist
This table covers common models. Your optimal choice depends on power contract terms, existing infrastructure, and coin algorithm. Request a deployment quote or review our equipment services for a facility-specific recommendation.