How does write speed affect an OS drive performance?

The title basically explains my question but to give an example, Ive seen SSDs with ~450-500 MB/s write speed then SSDs with ~120 MB/s write speed.

Does the lower write speed affect on OS drive performance? If so, is the performance hit noticeable or negligible?
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More about write speed affect drive performance
  1. Yes - it does affect the OS pefrormance a little bit. But you should focus more on write speed and access times. For example Crucial M4 (which is the most often recommended drive) has low write speeds, but high write and access speeds.
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