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Motherboards and BIOS PCIe bifurcation required

Mon Jul 05, 2021 7:06 pm

Description of PCIe host adapter to SFF-8643 states the above. Could anyone provide what exactly needs be done? ... N8JBWS4448
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Re: Motherboards and BIOS PCIe bifurcation required

Tue Jul 06, 2021 3:53 pm

It requires a platform (PCIe controller) and UEFI/BIOS that properly implements PCIe bifurcation (The ability to split-up and re-allocate PCIe lanes electrically). This is mostly limited to workstation and server-tier boards. There are few power-user, enthusiast-tier boards that do it as well.
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Re: Motherboards and BIOS PCIe bifurcation required

Tue Jul 06, 2021 9:29 pm

You need to check your specific board/CPU/BIOS combination to see if lane bifurcation is supported. It's pretty hit or miss - my X570 board can do it, but my last Z170 board could not.
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Re: Motherboards and BIOS PCIe bifurcation required

Wed Aug 11, 2021 9:02 pm

Motherboard should be compatible and BIOS should also have an option to enable it. You would need to dig the bifurcation options for your motherboard in BIOS settings

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