Video card bandwidth in PCIE3 slot of X570 Taichi?

why are you worried on the slot speed you shouldnt have anything that could use it unless its some multi raid card

I guess if the width of the wiring on PCIE5 slot is x4, then PCIE3 is x8 only?

Yes, it looks like PCIe3 is wired as an X8, x16 is wired across the whole length of the slot.

There shouldn't be any issues using PCIe3 for your GPU, even PCIe 3.0 x4 offers plenty of bandwidth for most modern GPUs. PCIe 4.0 x8 has roughly the same bandwidth as PCIe 3.0 x16 (the bandwidth roughly doubles with each new generation). Similarly, even the bottom x4 slot should be fine as it will perform roughly on par with PCIe 3.0 x8.

I hope this helps ;)

OK, with the help from everybody here, I am beginning to understand.

Now, what I'm confused about is the specifications state it supports AMD Quad CrossFireX, 3-Way CrossFireX, and CrossFireX. I can understand the CrossFireX with two graphics cards, then both are going at x8 in PICE1 and PCI3.

So how do you do the Quad CrossFireX and the 3-Way CrossFireX? And what will the cards be going at? They all can't go at x8, so maybe with the 3-Way the cards drop to x4? But is the Quad CrossFireX then at x1 for all four cards? Doesn't that somewhat defeat the concept of CrossFireX, especially if everything drops back to x1?

Note: I'm not actually wanting to do any more than one graphics card, but it would be appreciated if I could get to understand it.

gizmic wrote: Quads are done with 2 dual gpus = pcie1 @ x8 pcie3 @ x8 ... dont know where you get x1 it wont drop that low with all slots populated

OK, now I understand much better. My definition of "all slots" included PCIE2 or PCIE4, since I was thinking there would have to be four graphics cards for "quad."