PSA: GIgabyte X870I Ice has no riser compatibility issue with T1 riser
Today I took out Asus B650I for RMA and replace it with Gigabyte X870I. Out of box, together with 4080 super and v2.1 stock riser, I was able to boot on first try and game normally without issue. It seemed to be widespread problem with older gigabyte ITX boards so just putting it out there.
One thing I slightly dislike is that one of 4 screws securing mobo is way too long for T1's standoff, but not a deal breaker.