Since when ?
I read something about it. Can't remember the details.
You know, I always take annotations on hints and tricks and so I did a search with keywords "x16" x8" in my text files - No joy.
Mind draws nothing but card falling back to x8 due to missing components.
Double check with a magnifying glass, compare with photos. That's what I would do.
Nbitor and NVFLASH solving issues? Hardly, but check it out.
I guess x8 is fine, x4 hits performance, but hey, you are the one who likes engine and speed !? I've seen some guys installing a damn graphics card in the x1 slot! 😎