17:37
2026-09-30
forum.level1techs.com
ai-infrastructure
AM4 motherboard with quad R9700's behind plx88096 ROMBAR Woes
A user on an AM4 X570-D4U-2L2T/BCM motherboard resolved missing PCIe BAR space that blocked four R9700 AI GPUs behind a PLX88096 switch by disabling Legacy CSM support in the BIOS, which also restored…