Previous Nvidia 500 and 600 chipsets have got horribly hot even at standard speeds, but the 790i Ultra SLI seemed to behave satisfactorily with the tried and trusted Asus passive cooling system. Checking with a temperature probe showed that the chipset cooler was hitting 65-70°C, and that was the point when the system would lock.

PCMark Vantage Results

Longer bars are better
Tests did not complete with Core 2 Extreme QX9650 set-ups