@Adrian1976
do you have anything else connected to the PCIE side on that PSU? i assume you are using the 4xPCIE8 to 12VHPWR adaptor that came with the card?
maybe try a) check the adaptor connection is pushed all the way in and solid or try a different adaptor b) unplug anything that is drawing off the 12V PCIE rail c) disconnect your case fans and RGB etc and just run the bare essentially and leave the case open air for now d) last thing is try a bigger PSU rating if possible?
also what is the part number for the PSU?
not sure if the hotspot reading is also registering MOSFET temp. those things will run hot if there is some issue in the power delivery. but GPU hot spot is understood to be somewhere on the core itself...