Are there any pitfalls to avoid in buying PCIe/m.2 adapters?

AggressivelyPassive@feddit.de to Linux@lemmy.ml – 34 points –

I'm planning on giving an older machine a small upgrade with an SSD, but since that machine does not have an m.2 port, I was thinking about buying the cheapest PCIe adapter I could find. Besides the obvious stuff like ports, PCIe gen and lane count, is there anything I should look out for? Specifically regarding Linux?

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Unless you are using a SATA NVMe, these either don't work or seriously bottleneck your performance

He didn't specify what sort of M.2 SSD he has so I thought that I would throw it out there as an option.

Plus as he said it was for an older computer & was looking for the cheapest adaptor that works, I guessed that he wasn't too concerned about getting the most performance possible out of the setup.