x399 taichi no boot with bifurication on, 4x4x4x4 |
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smoothrun
Newbie Joined: 01 Sep 2021 Status: Offline Points: 35 |
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Posted: 01 Sep 2021 at 6:12pm |
MB: x399 taichi bios 3.90 and 3.50 tested.
cpu tr 1950x So i have a pcie splitter card connected to 4 U.2 nvme disks. both confirmed working on another amd system with bifurication 4x4x4x4 on. but on my x399 taichi i connect it to the pcie 4 slot(set to 4x4x4x4 mode), and as soon as i have more than 1 nvme connected to the slot it halts at boot code 94. if i disconnect all but one of the nvme drives it boots fine. so far ive tested turning iommu on/off. pcie1 has a 16x gpu pcie2 has a 4x card working fine pcie4 has the pcie16x to 4x u.2 plugs only works with 1 nvme connected. pcie5 has a 4x card working fine. |
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smoothrun
Newbie Joined: 01 Sep 2021 Status: Offline Points: 35 |
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it stops at post code 94 fwiw
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