GPU #2 shuts down. Temperature control?

[atom]

No, but maybe not enough workload. You should get a warning like this:

ATTENTION!
The wordlist or mask you are using is too small.
Therefore, hashcat is unable to utilize the full parallelization power of your device(s).
The cracking speed will drop.
Workaround: https://hashcat.net/wiki/doku.php?id=fre...full_speed