When outfitting a single-site yard, the gap between a 0.05 TH/s entry unit and a 0.15 TH/s mid-tier machine is more than a number on a spec sheet. It determines how many breakers you need, how much aisle space you lose to power cabling, and whether your cooling system can keep pace during a humid Busan August.
Why 0.05 TH/s Matters as a Floor
Units below 0.05 TH/s rarely justify the rack space and electrical overhead in a commercial yard. At that threshold, you begin to see ASIC models with dedicated power supplies, standardised mounting brackets, and repair-part availability through Seoul distributors. Below it, you are often dealing with legacy GPU rigs or decommissioned hardware with inconsistent power draw.
For a 400-amp three-phase service — common in converted agricultural buildings across Gyeongsang — we typically model 0.05 TH/s as the minimum per-unit rating when calculating how many machines fit within 80% of safe panel load.
The Mid-Tier Band: 0.10 to 0.20 TH/s Per Unit
This range is where most of our single-site clients land. Machines in the 0.10–0.20 TH/s band offer better joules-per-terahash efficiency than entry units while remaining physically manageable. A two-person crew can lift, rack, and cable them without forklift access.
The trade-off is heat density. A row of 0.15 TH/s units puts more watts into the same square metre than 0.05 TH/s entry boxes. If your inlet air already runs above 30 °C in summer, the efficiency gain may be offset by thermal throttling unless you invest in exhaust capacity first.
A Practical Decision Framework
- Measure your available amperage before comparing models. Hash rate per dollar means little if you can only power 30 units.
- Record summer inlet temperatures for at least two weeks. Efficiency ratings assume 25 °C ambient — coastal yards rarely see that.
- Check spare-part lead times for your shortlisted models. A 0.18 TH/s machine with a six-week fan backorder is a liability.
- Stage deployment if you are near panel capacity. Running 40 units at full rate beats 60 units throttling at 70%.
What We Recommend for Most Yards
Operators with existing 200–400 amp service and basic roof ventilation typically benefit from clustering around 0.12–0.16 TH/s per unit. Entry 0.05 TH/s hardware makes sense for test deployments, secondary feeds, or sites with severe space constraints where every rack position counts.
We bench-test every model on our shortlist at our Busan workshop before including it in a procurement recommendation. Manufacturer spec sheets are a starting point — measured watt-per-TH under local voltage conditions is what matters at your breaker panel.