Sadly I have already tried this and still falls over.Could you try putting some sort of support under the GPU to push the back of the card up just slightly higher.?
I think unluckily it's beyond saving.
Just ran the GPU tests in OCCT for a couple of hours (card in lower slot) and it passes with flying colours.
So think I'll give it another 24 hours and order up a new motherboard. I'm leaning towards the MSI Z790 gaming plus, very similar to my current boards (need to pick up some DDR5 as well) and a Graphics card prop / bracket as well.
Got to laugh I suppose.