PCIE 4 GPU in PCIE 5 slot

Hi there

First post/question as I intend buying an X870 Pro RS mobo soon. I am hoping someone could confirm that a PCIE4x16 RTX4080 Super GPU would connect at PCIE4x16 speed when in the main PCIE5x16 PCIE1 slot on the motherboard. The internet is - as usual - full of confusing, conflicting and misleading comments in this regard.

Thanks!

Thanks very much for this. I assumed that would be the case but getting formal confirmation is good. Crying-for-the-moon-perfect would of course be if someone who has this combination running on this board and show something like GPU-Z showing the detected config being PIIE4x16! https://forum.asrock.com/smileys/smiley36.gif

Thanks again!

Indeed!