Client Stories
Specific outcomes from real appointments
Short Notes
Ordered the audit on a Whatsminer M60 before signing a twelve-unit PO. Report showed our intended underclock still missed the J/TH target we needed for night-only running. Switched models and saved roughly ₩340,000 monthly on the same breaker budget.
— Operator in Incheon, bulk order stageSite visit caught a duct that recirculated hot air back into intake. Electrician quote matched the punch list. Visit fee was less than one week of wasted hash from thermal throttling.
— Warehouse retrofit, GimpoModeling session translated my apartment tariff into something I could actually read. Still learning the sheet, but first month matched within 6% of the forecast.
— Home miner, Seongdong-guExtended Case: Gangnam Basement Farm
A client planned eight S21 units in a converted storage room. They booked an audit on the exact SKU the supplier quoted, plus a site visit before payment.
Audit finding: Wall draw at 28°C ambient ran 3.8% above manufacturer sheet at stock clock. Underclock profile in the firmware menu did not linearly reduce joules per terahash.
Site visit finding: Intended rack row sat beneath a dormant HVAC return that would activate in July. Exhaust fan capacity was adequate only if units were staggered, not stacked in double rows.
Outcome: Client reduced order to six units, relocated rack row, and scheduled night-heavy uptime. They reported payback on our fees within the first billing cycle through avoided over-order and throttling downtime.
Client reservation: They noted our initial visit report used generic rack vendor part numbers; a revised appendix with measured bay widths arrived two days later at no charge.
Extended Case: First-Time Home Miner
Hye-won in Seongdong-gu weighed a single 0.05+ TH/s class unit against a used S19 variant. She booked power modeling only—no audit yet.
We built a sheet with her KEPCO residential tier, 65% uptime assumption, and shared-building noise constraints. The used unit showed lower upfront cost but higher J/TH after fan wear.
She chose a newer efficiency-tier unit and later booked an audit to verify post-delivery draw. Meter matched bench within 5%.
Mild reservation from client: Wished night-rate tab had been in the first spreadsheet draft; we added it in the revision call.