TFX fixed my issues as well.
My remaining issues were from VRM's also affecting the hotspot, which I attributed to "TFX issues" originally. Like you, I didn't know what was going on.
However when I took apart the card to test the contact pressure with innovation cooling pressure paper (fujifilm Ultra Low Prescale), the contact pressure was even higher than it was on my Radeon card or my desktop CPU IHS! I didn't put 2 and 2 together until I remembered that reddit post about the ripped VRM pad and the 30-40C hotspot delta.
This then stared to make sense when I realized I was seeing hotspot wild swing oscillations by as much as 1.2C back and forth, while the core temp was sitting at like 0.1C...
That's when I took the card apart and saw the VRM pad on the right side.
then I looked at igor's picture (had to flip the orientation) to see that the melted areas were all on NVVDD VRM's...and guess what feeds the core? Yep.
I put 2mm pads on the VRM's instead and not only did temps drop on everything, power draw dropped also. (I could tell the power draw dropped and wasn't a false reading, because the three GPU 12v rails (not the PCIE power ones) weren't dropping as much either, so the VRM's were getting cooled better=less power wasted=less power used.
That's why I suggested that you check your VRM pads. But I didn't realize your hotspot was already fixed. I thought you had bad hotspot temps
again.
I guess it was the thread bump and how you worded the first reply which made me think you were having issues again.
I guess it was this post, I thought you were having problems again. I didn't know it was fixed. That's why I made the comment for you to check the VRM pad contact pressure.
Edit: It's a 3090 Strix OC Hey guys With the inclusion of "GPU Hotspot Temperature" in the latest HWinfo, I have noticed my 3090 Strix OC has a about a 30c Delta between load core temp and hotspot temp 72c temp, 102c hotspot temp. Can others with 3090 show their hotspot temp with Heaven...
www.overclock.net
It's really a mess that both Core AND VRM contact issues get reported to the hotspot.