For our temperature testing, we measure the peak memory temperature under load. A reading under load comes from running Cyberpunk 2077 for 30 minutes.
Likewise, GDDR6X temperatures are no problem for the Amp Extreme Holo. The Amp BIOS saw a peak of just 72C, while the Quiet BIOS saw the memory run 8C hotter. Both results are absolutely fine for memory of this calibre and are competitive against the likes of the Palit GameRock OC and MSI Suprim X.