We took note of the drive’s temperature during some of our benchmarking runs.
ADATA's Legend 970 not only has a chunky aluminium heatsink but for extra cooling, it has a tiny built-in fan. On top of that the cooling fins have had a surface crystallization treatment to increase the overall air contact area. The combination works well although you can hear the fan from time to time, it's certainly not a wailing banshee that some tiny fans tend to be. During our benchmarking runs, the hottest the drive got was 60° C during the CrystalDiskMark 8 default write test. It averaged 48.3° C for the non-4K tests.