Practical implication of a x2 M.2 interface?

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sunsanvil

sunsanvil

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While there are some exceptions, I notice the majority of mid/low tier (and even a few high end) motherboards features a pair of M.2 sockets, one x4 and one x2.

In a practical sense, how "bad" or hamstrung is a PCIe SSD going to be in an x2 slot?
 
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With high end M.2 Nvme drive ? ~half speed. Its limiting you to ~1GB/s, in theory 1970MB/s but for most drives its a bit more than 1 GB/s.
its still twice the sata and you will see all the IOPS your drive will have, so unless you copy stuff around, you wont notice this limit.
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Rdslw

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With high end M.2 Nvme drive ? ~half speed. Its limiting you to ~1GB/s, in theory 1970MB/s but for most drives its a bit more than 1 GB/s.
its still twice the sata and you will see all the IOPS your drive will have, so unless you copy stuff around, you wont notice this limit.
 
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sunsanvil

sunsanvil

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So is it fair to say that, in practical terms, it is large file copy/transfer which would be most affected, but typical random I/O less so?
 
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