Client Stories

What Operators Say

We run 86 Whatsminer M30S units near Masan. Before the audit, our night shift was constantly swapping fans because we had no schedule — just panic. The four-week calendar they delivered cut our unplanned downtime by more than half in the first quarter. I wish the report had included photos of every rack, but the written notes were thorough enough.

— Ji-hoon Seo, facility manager

Portalcypresscore told us three of our S19 Pros had degraded thermal paste and would fail within six weeks. We thought that was pessimistic. Two failed at week five. The third we caught during a planned window. Their bluntness saved us a weekend of emergency labor at double overtime rates.

— Eun-kyung Han, independent operator, Jinju

The cleaning coordination service is straightforward. They show up during our 11 PM–6 AM off-peak block, finish in about five hours, and leave a log entry. One visit they arrived 40 minutes late because of traffic from Busan — they credited ₩50,000 without us asking. Not perfect, but reliable.

— Tae-yang Yoon, 34-unit container farm

Extended Account: Gimhae Facility Rebuild

Client: Min-jun Park
Fleet: 120 Antminer S19 units in a repurposed warehouse
Challenge: 14+ hours of monthly unplanned downtime, mostly fan and PSU failures

Situation

Park’s facility had grown quickly in 2022 without a maintenance plan. Technicians responded to alarms as they appeared, often during peak-rate afternoon hours. Power bills spiked whenever a fan failure forced adjacent units to compensate thermally.

Our Work

We spent three days on site in March 2024. Every unit was thermally imaged, and failure logs from the previous eight months were cross-referenced against ambient temperature records. We identified that units near the west wall — exposed to afternoon sun through metal siding — failed 2.3× more often than interior racks.

Outcome

The maintenance calendar grouped fan replacements and filter changes into four-hour windows every third Sunday, aligned with Park’s cheapest electricity block. Within 90 days, unplanned downtime dropped from 14 hours to under five hours per month. Park added reflective insulation to the west wall separately, based on our recommendation.

Park’s Note

“The report was not gentle. They called our cable management ‘a fire hazard waiting for a humid Tuesday.’ We fixed it. Hashrate is steadier now, and my technicians actually sleep through Sunday night instead of rushing to failed units.”

Extended Account: Jinju Immersion Pilot

Client: Eun-kyung Han
Fleet: 18 immersion-cooled units (0.08 PH/s each)
Challenge: Uncertain service intervals for a new cooling method

Situation

Han had converted a section of a garage to immersion cooling and had no local reference for how often fluid filters and pump seals would need attention. Manufacturer documentation assumed air-cooled intervals.

Our Work

A two-day performance review measured fluid temperature stability, pump vibration, and hashrate consistency across a 72-hour load cycle. We recommended a six-week filter check and a quarterly fluid top-off during Han’s lowest-rate overnight window.

Outcome

After six months on the schedule, Han reported zero unplanned shutdowns. Fluid consumption matched our estimates within 8%.