x870e Taichi PCIe Slot Bifurcation

I've tried with two graphics card and get x8 on both slots (with both slots occupied) so just put your graphics card in the bottom slot and whatever x4x4/x8 in the top.
Mobo Asrock X870E Taichi

//Dr.

NDRE28 wrote: Hi! I own the ASRock X670E Taichi. I have the same bifurcation options as you do. I've tested all of the bifurcation options. Unfortunately, x8/x4/x4 means that your bottom PCIe slot will run in x8 mode, while your top slot will run in x4/x4 mode! ASRock should create the x4/x4/x8 mode too! But, so far, they didn't.

Thank you for your intelligent reply!

It's a shame ASRock has such poor documentation for the BIOS of what should be an excellent MOBO, especially since the BIOS has so many options. And it seems stupid for the bifurcation be x4x4x8 (even more so since the documentation claims x8x4x4) when the graphics card has to be mounted in the top slot because it would block access to the headers on the bottom of the MOBO if it was installed in the bottom slot.

Lady Fitzgerald wrote: Let me rephrase my first question. In the BIOS (UEFI) manual, it shows configuration options [Auto] [x8x8] [x8x4x4] [x4x4x4x4]. If I have a graphics card in the top slot and a card for two SSDs in the bottom slot and I chose the x8x4x4 option, would I get x8 in the top slot and x4x4 in the bottom slot?

thats what the logic suggest,

otherwise this motherboard with built in $11.5 bifurcation adapter would make no sense, but you never know

bump

The board only has two PCIe slots, so I assume x8x4x4 will give you what you want (top slot at x8 and bottom slot at x4x4).