NVLink SLI makes x8/x16 moot, unless in the last month Nvidia used a driver update to limit the bandwidth from the cards, so the only time it'd matter is if a game hates a SINGLE card being on x8 for some reason.
Correct
Correct, and it is a rarity, the only games I could think of that might do it are Dirty Bomb and Ark: Survival unoptimized. And those are just my guesses, since both games run pretty different even on same-hardware PCs, I couldn't say. They have always run exceptionally badly for me on single GPU though.
I was thinking about a much more significant drop in performance, like I could barely hold even 60 flat in dirty bomb regardless of settings sometimes when I used to try it, and my GPU usage was low as hell and my PC had ample other performance leftover no matter what I did. The devs couldn't seem to figure out what my issue was either. Thinking back on it now, it might have been that, but I have no way of checking since I cannot force my GPUs to x16 in my laptop and I don't yet have a desktop to check with. You really shouldn't worry about it, you can always turn off the slot and get x16 properly if you must play one of those games on a desktop (assuming your board is half decent anyway)
