Pcie gen 3 x8 a bottleneck for the rtx 3090?

[Origami Cactus]

So today I didn't find my m.2 ssd in windows, it turned out to be because Asus messed up the motherboard, and I can only run 2x m.2 ssds when gpu is set at 8x bandwidth. Come on Asus, it is an x470 itx board, it has a single x16 slots and you still had to share it with an m.2? Where did all the chipset lanes go?

 

Anyways, question. Will I bottleneck noticably from it in 4k, 60fps gaming?

[IkeaGnome]

I don't think it's anything you'll notice. 3090 isn't that much faster than a 3080.

If your game is on your boot drive, test it in x8 shut down, remove the drive and test it in x16. 

[Origami Cactus]

Just now, IkeaGnome said:

I don't think it's anything you'll notice. 3090 isn't that much faster than a 3080.

If your game is on your boot drive, test it in x8 shut down, remove the drive and test it in x16. 

I mean I tested 3dMark and it is a noticably higher score, about 12800 instead of 12400, but you are right, in gaming i don't feel a difference.

And from your chart i can see that it doesn't cause stuttering too, as 1% lows are the same. Thanks.

[IkeaGnome]

2 minutes ago, Origami Cactus said:

I mean I tested 3dMark and it is a noticably higher score, about 12800 instead of 12400, but you are right, in gaming i don't feel a difference.

And from your chart i can see that it doesn't cause stuttering too, as 1% lows are the same. Thanks.

That's about a 3-4% change. 2% or so is considered margin of error. There's a world where you get 2% low on x16 and 2%high on x8 and notice no difference even in artificial loads.