this is with fan pointing to it placed inside the front face of the case also the side door is open. I tried placed the gpu in second slot and placed 12in fan with high speed above the chipset it only went down 6c !! Do you know the max temp for x570 chipset ?
Yes the name in BIOS is PCH (Platform Controller Hub)
Can you see a chipset voltage maybe?
This is mine at 27C room temp with no case at all. The GPU (2.5slot) is over the chipest HSF and I have a 120mm (1200rpm) fan under the GPU to blow air to it. Chipset fan is stopped.
Voltage around 1.0V
The standalone temp (now ~58C) is all times under 70C on the hottest days.
How many peripherals you have connected on the board? (Mostly drives and PCI-E cards)
Can I see a clear photo of the case with the side panel off?
There has to be a way...
Its not the best idea to not use the primary PCI-E x16 slot. Still you can try it.
Look now at your 6800XT section on HWiNFO sensors. PCI-E link speed should be 16GT/s (at max at least). This is the full speed of PCI-E Gen4.0 x16.
Use system summary mode to view the GPU PCI-E link speed and also the NVMe drives link speed. You can check them all after you try the 2nd GPU slot.
I was hoping for a straight (full) side view photo actually, for better understanding the spaces. I can see that you can't place a 120mm under the GPU (maybe an 80mm ?).
Or maybe a 120mm one right at the end of the GPU, in front of that case led fan (second pic).