Hmm, I was never "accused" of any non-standard pronunciation Well, yet I know that I do vibrate my vocal chords when I pronounce "х" as a single sound, and this has nothing to do with my hearing. All you need to do is to put your palm on your throat to check if a consonant or vowel is voiced or not.
For example, when I pronounce "ц" I don't feel any vibrations with my hand on my throat, my throat is practically still when I do that.
But when pronouncing "х" as a single sound I feel with my hand that the muscles of my throat vibrate. Although it's only true for a standalone "х".
In your example: сдох - I definitely don't feel any vocal chords vibrations for my final "х"
The "х" as a starting sound of a word:
Хороший - no vocal chords vibrations for "х"
In the middle:
Плохой - no vocal chords vibrations for "х" either.
However for your other example:
сдох бы - I feel vocal chords vibrations for the "х" sound there, but not as much as for a standalone "х".
Anyway, that is an interesting converstation we have. Learn something new everyday