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Comment by Sakos

2 years ago

1) Nobody says otherwise about cheap anything NVMe. They're pretty terrible once they've exhausted the write cache. This is well-known and addressed in every decent review by reputable sites.

2) Sustaining throughput seems the least of our problems when some unknown number of NVMe SSDs might be literally losing flushed data.

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Sakos

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kristopolous  2 years ago

Is this expected with say Samsung evo 9X0 pro? Or is there another tier above consumer level gear? Is there something I should go with?

  • vladvasiliu  2 years ago

    I don't know about the 950 pro specifically, but when I bought my 980 pro I looked into this, and it seemed that this drive does have a drop in write speed after a while (can't remember how long) but "low speed" wasn't that low. Again, don't remember specifics, but it was above 1 GB/s. Other drives fared much worse, with a drop coming in sooner and going lower.

    Depending on your needs this can be an issue.

    For me, using this drive for random "office" work, I figured I'd never feel it in practice. This drive is supposed to support PCIE 4, but my laptop only does 3. This also "helps", since it won't fill whatever cache it uses as quickly. In practice, it was able to write 100 GB at the top speed. Didn't bother to test more. The only time I've ever written that many data at a time was restoring a backup when I bought the drive. Since my backup was on 2.5" spinning rust, it wasn't an issue.