Does anyone have an idea what can lead to this hashrate?

All chips seem to be fine. It is powered by a 1600W PSU (all 4 PCIe Cables connected), but it is only ~half of the promised hashrate.
Latest firmware is also installed...
Kind regards
open up ur S3 and re-apply the thermal paste
i think it'll be leaking around the components
well, maybe bitmain was in hurry and just shot the thermal like making cake

check the 1st blade, no need to open the 2nd blade