Question sustained write speeds dip very low (SSD,NVME)

AndrewCRX

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Oct 23, 2019
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Hello everyone, I hope you're all doing well. I have a question that I can't find an answer to on the internet. Why is it that my transfer of BF5 from my NVME drive to my SSD is hovering around 65. MB/s? It goes up up to 90 sometimes but very rarely and even going to 0 MB/s for a few seconds after hovering at the mid teens. What in the heck is going on? I would expect much higher speeds. Is it the way the file is packed? https://ibb.co/L1LBg5C
 

AndrewCRX

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Oct 23, 2019
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I have tested and observed moving another game that is packed differently to the SSD at the same time and am still getting mediocre results. Both are at 30 MB/s and dipping as noted before. What could be going on? A driver issue? My Samsung 970 evo plus is all updated running x4.
 

Fix_that_Glitch

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Mar 31, 2019
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Game files are notoriously split in to small file packages if you will. Which is a killer for transfer speed. Ad to that that you are transferring to a slower sata drive. I have a Nvme and when I download games the transfer rate is about what you are seeing even with 900mbps internet speed.
 

AndrewCRX

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Oct 23, 2019
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which one is the source, and destination?
what the model of the ssd?

it bottleneck on the slowest component which is the ssd.
The source of the file is my drive file, it's an Nvme with an OS of Windows 10 Pro 64 bit I cloned over from the SSD using the included software of my Samsung Evo 970 Plus 500GB Nvme drive. Here are the included links to benchmarks I just performed of both drives.

https://ibb.co/59Wvbj7

The SSD is a Silicon Power 256GB SSD 3D NAND A55 SLC Performance Boost SATA III drive. It's 30 bucks on Amazon, a cheap drive to be sure.
 

AndrewCRX

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Oct 23, 2019
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Game files are notoriously split in to small file packages if you will. Which is a killer for transfer speed. Ad to that that you are transferring to a slower sata drive. I have a Nvme and when I download games the transfer rate is about what you are seeing even with 900mbps internet speed.
Why are smaller (Looser) files harder for SSD's to process? Nvme I suspect does it better? My understanding of Nvme is it's using the lanes(?) on your motherboard, and it's like a highway, suddenly you have communication going back and forth freely with nvme in contrast to SSD on SATA III that is bottlenecked by the very nature of the cable technology that binds it, choking the data being sent and slowing down dramatically when transferring multiple files. Am I correct in this way of thinking?
 

AndrewCRX

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Oct 23, 2019
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you thinking it wrong. the problem is your SP A55, not the Evo 970 Plus
it can't write fast enough
I'm not blaming the Nvme. So if I got a better quality SSD such as another Samsung but in SSD form, I would have much better performance in respect to file transfer speeds?
 

USAFRet

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Mar 16, 2013
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Why are smaller (Looser) files harder for SSD's to process? Nvme I suspect does it better? My understanding of Nvme is it's using the lanes(?) on your motherboard, and it's like a highway, suddenly you have communication going back and forth freely with nvme in contrast to SSD on SATA III that is bottlenecked by the very nature of the cable technology that binds it, choking the data being sent and slowing down dramatically when transferring multiple files. Am I correct in this way of thinking?
Smaller files are the issue for any drive type.
The OS still has to do the same processing to find the next tiny file and start the copy for that.

It happens much faster on an SSD (any SSD type), but still not 'instant'.

Additionally, any copying to-from different type drives depends on the performance of the slowest device in the chain.
 

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