Conservative Cooling Profiles for Long Hardware Life
South Korean summers push ambient warehouse temperatures past 30°C in facilities without dedicated HVAC. Operators who chase maximum hash rate through aggressive overclocking often see unit failure rates climb within 18 months. Our assessment practice deliberately uses conservative cooling profiles because most of our clients plan for three-to-five-year hardware lifecycles.
What Conservative Means on Our Bench
- Ambient held at 24°C (not the 18°C some manufacturers use)
- Stock firmware, no overclock profiles
- Fan speed left on automatic — we do not force low-RPM “quiet modes” that raise chip temperatures
- Underclock test included: a single step down to document the watts-per-terahash trade-off
The Data Point Operators Request Most
Watts per terahash at stock settings under our cooling profile. This single figure helps compare models with different nominal hash rates on equal footing. An S19j Pro at 29.4 J/TH under our protocol often outperforms an older S17 Pro at 39.4 J/TH, even though both clear the 0.05 TH/s floor comfortably.
Facility Design Implications
If your cooling budget is fixed, conservative operation may let you pack more racks into the same thermal envelope. We have seen operators reduce chiller load by 12–15% after switching from overclocked to stock profiles — accepting a hash rate reduction that still met their revenue targets.
When Aggressive Cooling Makes Sense
Short-term arbitrage windows or hardware with imminent obsolescence may justify higher temperatures and overclocks. We document both profiles when requested, but our default report reflects the conservative settings described here.