@Avro Arrow i unluckily cant sent it back. He is extremly angry because i gave him only a 2/5 rating on the platform, he even downvoted our 2 people company with fake ratings on google maps as result of my mentioned rating and 10min discussion.
He is not an actual scammer, he could not send me a second card at all after i have sent him the first one back. (I paid before already) But ignorant and egoistic person probably as he sees his damage only and not mine.
I think i could reach similar passmark values overclocking this card compared to previous 5700xt using temps as guide line. (this card 16500 at ~75°c , 5700 XT 19000 at ~95°c)
On the label its written "xfx 57xl8l v1.1" "xfx rx 5700 dd ultra 86 boost up to 1750M D6"
Anyway im trying to make the best out of it, was able to repair the fan with glue. (Hopefully the glue works long term)
But the black screen issue is still there, i need to invest more time into it tomorrow.
The black screen with reboot occurs aswell in games (today after ~30-45 min overwatch 2)
Edit:
-the black screen with reboot always happens at "GPU compute" sequence in passMark.
-I retried deinstall and install gpu drivers with DDU and AMD deinstall tool -> no improvement
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Techpowerup VGA bios collection I tried installing the latest vBios from here -> couldnt install as this one is already installed even if "image size" seem to be different from current and flashable.
-According xfx psu minimum requirment is 600w, mine is 500w. But according calculations of max consumption i should be easily in range. May its necessary tough ? (would be annoying buying a new psu and having still the same issues, checked also 5700XT which stated 650w requirment, maybe that could be the reason for coil whine ?)