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Dec 6, 2012
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NVME to USB C enclosure

Looking for a good NVME enclosure to USB C I have seen some on Amazon, but their read and write 4K random is very slow at around 20 MBs. Not sure if this would really effect me.
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Mar 23, 2008
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waloshin wrote: Looking for a good NVME enclosure to USB C I have seen some on Amazon, but their read and write 4K random is very slow at around 20 MBs. Not sure if this would really effect me.
I have one I can test, if it’s important to you. I’ve got a Samsung drive in it. Let me know.

But since you don’t say what you want it for, it’s hard for someone to tell you whether it will make a difference to you or not.

C
[OP]
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CNeufeld wrote: I have one I can test, if it’s important to you. I’ve got a Samsung drive in it. Let me know.

But since you don’t say what you want it for, it’s hard for someone to tell you whether it will make a difference to you or not.

C
I would use the drive for external video footage up to 4K while editing on my Macbook Air 2018.
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waloshin wrote: I would use the drive for external video footage up to 4K while editing on my Macbook Air 2018.
The “4K” refers to the size of the blocks of data being written, AFAIK. Not to the type of video data you’re saving.

C
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This is the test of my Samsung 970 1TB drive (internal):
Internal Samsung.PNG
[OP]
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Not bad seems like the controller is not limiting the drive too much other than the usb 3.1 limitation.
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When I benchmark my SSD it often shows less than half the rated 4k numbers. There was one time I was able to hit the rated 4k numbers but only once and never again.
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CNeufeld wrote: This is the test of my Samsung 970 1TB drive (internal):

Internal Samsung.PNG
Is that the pro or the evo?

The 4k tests look pretty slow for a Samsung 970, for both Evo and Pro.
toalan wrote: When I benchmark my SSD it often shows less than half the rated 4k numbers. There was one time I was able to hit the rated 4k numbers but only once and never again.
Not sure if you're aware, but Meltdown and Spectre patches hamper a lot of the benchmark numbers (I've tested). Dunno if it applies to your case (there's probably many other factors), but it's possible that the numbers that you're comparing are different because of that.

waloshin wrote: Looking for a good NVME enclosure to USB C I have seen some on Amazon, but their read and write 4K random is very slow at around 20 MBs. Not sure if this would really effect me.
Do you have a NVMe slot on your motherboard? Or can you get a NVMe to PCIe adaptor? Cuz NVMe to USB really destroys the benchmark numbers.
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[OP]
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Dec 6, 2012
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Plan to use on a 2018 MacBook Air externally.
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4K random speeds are what you get when reading/writing very small files; it has no relation to the "4K" in 4K video. It's often used as a benchmark for SSD performance for applications like booting the OS or loading programs. For recording video, you should see performance close to sequential speeds. Even SD cards, which often report 4K numbers less than 1MB/sec, have no problem recording 4K video.

Editing video, I'm not sure, but I would guess that the block sizes would be much larger than 4K. You might not see performance consistently in the 1GB/sec + range, but I'm pretty confident the performance would be more than adequate. You're using a Macbook Air with a thermally constrained ULV processor -- I imagine that would bottleneck your performance long before disk IO.
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