Replying to myself. Still not sure about the form factor, but, unfortunately, it looks like the RTX 30 Series cards - well, at least, RTX 3090 - have a differen

Replying to myself. Still not sure about the form factor, but, unfortunately, it looks like the RTX 30 Series cards - well, at least, RTX 3090 - have a different socket interface when compared to 2080 Ti (12 pins versus 8+6 pins).