Phoronix published a review on the Power Consumption & Thermal Testing With The Core i9 7900X On Linux
A quote from the article:
Following my initial Intel Core i9 7900X Linux benchmarks this week were questions raised about its power use and thermal efficiency. Here are some tests looking at those factors, including the performance-per-Watt.Power Consumption & Thermal Testing With The Core i9 7900X On Linux @ Phoronix