For our temperature testing, we measure the peak memory temperature under load. A reading under load comes from running Metro Exodus Enhanced Edition for 30 minutes.
Memory thermals are a clear high point for the Gaming OC though, with the OC BIOS keeping the GDDR6X temperatures at just 66C, and that increased to 70C when using the Silent BIOS, which is the joint-second best result on the chart. Clearly, Gigabyte's heatsink and cooler has been designed with memory temperatures in mind.