76 is fine, hell 86 is fine. I've ran cards at 90 for months straight with absolutely no downsides.

BUT to answer your actual question which no one really is, use -ttdcr setting to dynamically adjust dcri based on temperature. This is great when you expect temperature changes like if it's outside air cooled. Select the target temp, and I suggest 3 below your desired Target with it, such as -ttdcr 76 if you want to keep it under 80.