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PCIe bifurcation
(lemy.lol)
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this post was submitted on 18 Aug 2024
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I'm not sure what hardware you're running, but with my motherboard, to get 4x4x4x4 out of a slot requires sacrificing GPU bandwidth from x16 to x8
to get 4x NVMe drives out of a single PCIe slot without bifurcation you need a card that has it's own RAID controller. These aren't cheap (think ~$500) as they are specialty hardware, but it's a hell of a lot cheaper than a whole professional workstation or server.
You don't necessarily need a raid controller, I think a pcie bridge or switch chip will work too. They're still expensive but they're significantly less than $500.
This sounds like a path I could take - just buying a mainboard like that and making it a NAS. Which board do you have there? If it's AM4, I could get a similar one and just reuse my old CPU.