When the inlet temperature of hydro-cooling miners and immersion cooling is controlled at what degree Celsius, will their hashrate be maintained at a high level?

If the ambient temperature is normal, at what temperature do hashboard and chip need to reach before replacing thermal grease? What other parameters should I check to determine when to replace the thermal grease?

Within what temperature range of inlet and outlet liquid for a hydro-cooling miner can the miner operate normally (maintaining power)?

What is the maximum inlet temperature for M63 Series in Overclocking Mode?

What is the maximum inlet temperature for M64 Series in Normal Mode?