Client Stories
Testimonials and detailed accounts from mining operators who used our PSU matching and hardware review services.
What Operators Say
The PSU report caught a 20-amp mismatch on our Antminer S19 batch that our electrician had missed. We swapped to dual-rail units before the July heat wave and had zero shutdowns through August.
— Min-jun Park, Gyeonggi home miner (6 units, PSU-Matched Selection)
Thorough cable documentation, though I wish the turnaround had been a day faster. Still, the pairing advice saved us from buying undersized PSUs for our 0.1 TH/s expansion.
— Hye-jin Choi, Daegu small farm operator (PSU-Matched Selection)
Sang-woo identified harmonic distortion on our main panel that was causing weekly reboots. The on-site audit paid for itself in avoided downtime within the first month.
— Jae-won Han, Ulsan warehouse farm (On-Site Power Audit, 14 units)
We sent one Whatsminer sample before ordering thirty units. The longevity report flagged a fan bearing issue on our specific batch — we negotiated a partial replacement with the supplier. The test fee was minor compared to what we would have spent on premature failures.
— So-young Kim, Busan commercial operator (Hardware Longevity Report)
Clear, honest about what they cannot do. They told us our apartment wiring could not safely run more than two units at 0.05 TH/s each. We appreciated the directness rather than being sold an unrealistic setup.
— Tae-min Oh, Seoul apartment miner (PSU-Matched Selection)
Extended Case: Gyeonggi Farm Voltage Recovery
Client: 12-unit farm in Paju, operating since late 2022.
Problem: Intermittent shutdowns every 3–4 days during evening peak hours, no clear error codes.
Our engagement: On-site power audit over one afternoon. We logged voltage dropping from 228V to 211V between 7 PM and 10 PM on three consecutive days. PSU inlet temperatures spiked 8°C during these windows. Two units used single-rail PSUs that dipped below 11.4V on the 12V rail.
Outcome: Client installed a dedicated 60A sub-panel for the mining room and replaced two PSUs with dual-rail models we specified. Three-month follow-up showed zero shutdowns. Total remediation cost was roughly ₩2.1 million — the client reported this was less than two weeks of lost hash revenue during the failure period.
Client note: “The thermal photos of our cable connectors were uncomfortable to look at, but they made the case to my business partner immediately.”
Extended Case: First-Time Miner in Busan
Client: Single-rig operator in Jung-gu apartment, targeting 0.05 TH/s for learning purposes.
Problem: Overwhelmed by conflicting PSU recommendations on forums.
Our engagement: Standard PSU-Matched Miner Selection at our lab. Client brought photos of their breaker panel (15A dedicated circuit, 220V measured).
Outcome: Report recommended a specific efficient unit at 0.052 TH/s with a 750W platinum PSU. Included noise dampening suggestions for apartment compliance. Client reported stable operation for eight months at time of last contact.
Client note: “The cable diagram alone was worth the consultation. I would have used the wrong gauge extension cord.”