I don't think 80°C is necessarily bad for core temp, just without the pad fix the memory is probably past the 95°C limit.
This image shows 64% fan speed - 79°C core, and VRM area at 100°C but note that that is with furmark, with TDP at nigh on 100%
This image shows 90% fan speed - core at 71°C and the VRM area at 88°C, again, furmark, so I'd assume actualy VRM area to be less with TDP at 80-90% which is the most I've seen in games so far
so, super rough guestimations, but it would seem that the VRAM/VRM will be quite safe in most if not any scenario with the fan speed set to 85% or up
but, my god, I feared the contents of the room were going to be dragged into the singularity event that was my pc chassis when I set the fan speed to 90%. couldn't live with that!