Equipment Performance Review
Benchmark testing and thermal analysis for individual miner models, with a written report on expected service intervals.
Changwon · Since 2017
When Your Rigs Rest, Your Margin Bleeds
We review mining equipment at 0.05 PH/s and above, then map maintenance windows that cost you the least hashrate. No guesswork — just schedules tied to your actual fleet and power contract.
Request a Window Audit See the Process
What We Assess
Every unit we review is rated at 0.05 PH/s minimum. We focus on how long it takes to service, what parts wear first, and where downtime hits hardest against your tariff hours.
Maintenance Window Audit
A full-site review of your fleet that produces a ranked maintenance calendar tied to your electricity tariff and unit failure history.
Scheduled Cleaning Coordination
We schedule and supervise filter changes, dust removal, and airflow checks during your designated low-rate electricity windows.
From the Field
Operators across Gyeongsang and beyond share what happened when they aligned service calls with off-peak hours.
Our Antminer S19 fleet was losing roughly 14 hours a month to unplanned fan swaps. Portalcypresscore mapped a four-hour window every third Sunday and cut that to under five hours total. The report was blunt about which units would fail next — and they were right about two of them.
— Min-jun Park, 120-unit facility, Gimhae
The audit took longer than quoted because our cabling was a mess, which they flagged honestly. Still worth it — we rescheduled two major cleanings and saved about ₩400,000 in peak-rate electricity that month.
— Hye-jin Oh, small-scale operator, Changwon
Recent Field Notes
Practical writing on fan curves, hashboard swaps, and the arithmetic of downtime.
Why Coastal Humidity Shortens Fan Life on S19 Rigs
Salt-laden air in Gyeongsang coastal facilities corrodes fan bearings faster than inland sites. Here is what we measure and how to schedule replacements.
Counting the Real Cost of a Four-Hour Outage
A worked example using a 64-unit fleet, KEPCO time-of-use rates, and an unplanned hashboard swap at the wrong hour.