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?
OP was speaking about “a small upgrade”, most probably in general performance. 400 MB/s write speed won’t make the OS itself any faster than with a normal SATA SSD.
I said 400%, not 400MB/s. 4x faster is definitely a noticeable upgrade.