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Why do you think I might be having 3469 MB reading speed and 63 MB writing speed? KINGSTON SNV2S2000G NVME

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it is the heatsink. under that Kingston
that fan is not working case is fully open
sandisk is below the graphic cards correct

here my full case

View attachment 297868
No wonder it heats up imho, this even looks worse then my old 3770k with 11 years of use.
 

MonsterMMORPG

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i made this test

multiple times copy pasted 16 gb file from the other nvme

first time it was over 1 gb writing speed

in the second after writing like 10 gb more it dropped to 60 mb copy speed

any evaluation for this?
 
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i made this test

multiple times copy pasted 16 gb file from the other nvme

first time it was over 1 gb writing speed

in the second after writing like 10 gb more it dropped to 60 mb copy speed

any evaluation for this?
Running out of cache? Just return the drive and get a better one
 

MonsterMMORPG

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Running out of cache? Just return the drive and get a better one

here another very interesting test

i dont know what to tell

so it starts with 2 gb copy like 30
then drop downs to 100 mb

then increases and drop down again

check out the pictures

1685213909119.png


1685213916475.png


1685213922565.png
 

eidairaman1

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i made this test

multiple times copy pasted 16 gb file from the other nvme

first time it was over 1 gb writing speed

in the second after writing like 10 gb more it dropped to 60 mb copy speed

any evaluation for this?
Return drive and get money back, buy a better drive, and cool the drives down, you are thermally soaked with those HDDs,+ dust and rats nest. Stop going in circles
 

MonsterMMORPG

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Return drive and get money back, buy a better drive, and cool the drives down, you are thermally soaked with those HDDs,+ dust and rats nest. Stop going in circles

i tested the tempature it is not the tempature issue
good driver you mean more expensive driver or this is defected ?
 
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i made this test

multiple times copy pasted 16 gb file from the other nvme

first time it was over 1 gb writing speed

in the second after writing like 10 gb more it dropped to 60 mb copy speed

any evaluation for this?

That sounds like the Cache is filling up. 50-60 MB/s is pretty normal for QLC drives when the cache is full. The problem is that your drive should have around 561 GB of cache so you should not be filling it up unless you are copying a lot. You can try getting the Kingston SSD Manager to see if your drive needs a firmware update. I'd also recommend running HWInfo as often it has access to multiple temperature sensors on the SSD. Most SSDs have at least 2 temperature sensors, one for the controller and one for the NAND. It could be that we are only seeing the NAND temp from Crystal Disk and not the controller temp.
 
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That sounds like the Cache is filling up. 50-60 MB/s is pretty normal for QLC drives when the cache is full. The problem is that your drive should have around 561 GB of cache so you should not be filling it up unless you are copying a lot. You can try getting the Kingston SSD Manager to see if your drive needs a firmware update. I'd also recommend running HWInfo as often it has access to multiple temperature sensors on the SSD. Most SSDs have at least 2 temperature sensors, one for the controller and one for the NAND. It could be that we are only seeing the NAND temp from Crystal Disk and not the controller temp.
I'm sure it's no where near 500GB and likely more close to 30GB which is where the drop off is happening
 

MonsterMMORPG

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I'm sure it's no where near 500GB and likely more close to 30GB which is where the drop off is happening
ye that happened like at that point

the file was 92 gb

1685214889475.png


That sounds like the Cache is filling up. 50-60 MB/s is pretty normal for QLC drives when the cache is full. The problem is that your drive should have around 561 GB of cache so you should not be filling it up unless you are copying a lot. You can try getting the Kingston SSD Manager to see if your drive needs a firmware update. I'd also recommend running HWInfo as often it has access to multiple temperature sensors on the SSD. Most SSDs have at least 2 temperature sensors, one for the controller and one for the NAND. It could be that we are only seeing the NAND temp from Crystal Disk and not the controller temp.
checked and there werent any other temp displayed

sadly no firmware :/

1685215180013.png
 
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ye that happened like at that point

the file was 92 gb

View attachment 297898

I'm sure it's no where near 500GB and likely more close to 30GB which is where the drop off is happening

It's not just the singular file size but the combined file size of all the files you recently have written. The speed the drive actually writes to the NAND, particularly for QLC drives, is much slower than the drive's full write speed, which means that if you copy multiple files in succession the Cache will still be writing data to the NAND from the last write operation. The time it takes for the cache to completely empty is called recovery time.

Not saying this is the issue, just pointing out that singular file size is not as important as total written over a given period of time and if the drive was allowed recovery time.
 

Lei

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@MonsterMMORPG
Your motherboard is Gigabyte Z690 UD

You have 3 slots for nvme.
Try another slot. Doesn't matter if it doesn't come with heatsink.



here another very interesting test

i dont know what to tell

so it starts with 2 gb copy like 30
then drop downs to 100 mb

then increases and drop down again

check out the pictures

View attachment 297892

View attachment 297893

View attachment 297894
Erratic behaviour because your temps are so fu**ed up.


About large file copying, above 100gb, your Kingston has a small cache and is dram-less.

It's just how this model is. Nothing wrong about your pc or temp causes this particular issue:



If you frequently want to write large files, I suggest you get drives that have 3600tbw. They're not necessarily expensive. They're 2tb and have dram. Their speed is 5000 instead of the common 7000, but their endurance is tripled and are perfect for content designers (DaVinci)
You can see many YouTube videos suggesting those models.
What a producer needs is not actually that extra speed, but the endurance....


They're already faster than your Kingston and SanDisk, but not as fast as Samsung 980 pro. However have 3 times longer tbw than Samsung.
 

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It's not just the singular file size but the combined file size of all the files you recently have written. The speed the drive actually writes to the NAND, particularly for QLC drives, is much slower than the drive's full write speed, which means that if you copy multiple files in succession the Cache will still be writing data to the NAND from the last write operation. The time it takes for the cache to completely empty is called recovery time.

Not saying this is the issue, just pointing out that singular file size is not as important as total written over a given period of time and if the drive was allowed recovery time.
Iirc the fastest drives are still slc

But even they get bogged down
 
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How do the drive's temperatures look in HWInfo?

Another potential cause could be that your SSD is sharing bandwidth with other devices on your system or competing for IO. You seem to have 2 GPUs installed along with a lot of HDDs. You can try removing both GPUs, and disconnecting the HDDs and running only off integrated graphics temporarily to see if performance improves.

As Lei pointed out, switching the NVMe slot the drive is in could help as well.

About large file copying, above 100gb, your Kingston has a small cache and is dram-less.

It's just how this model is. Nothing wrong about your pc or temp causes this particular issue:


Hm, that's very interesting. That review has the 1TB NV2 with only 100 GB of cache whereas Tom's Hardware has the NV2 2TB with over 500 GB of cache.

Iirc the fastest drives are still slc

But even they get bogged down

Yes, SSDs use SLC for the cache because it's very fast and has extremely high endurance. That said, the cache recovery speed is based on the speed of the NAND used for the actual storage. The SLC cache can only write to the QLC as fast as the QLC can write, so in affect you get an SLC cache that fills up very quick and empties slowly. Typical QLC write speed is only 50-60 MB/s.
 

eidairaman1

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How do the drive's temperatures look in HWInfo?

Another potential cause could be that your SSD is sharing bandwidth with other devices on your system or competing for IO. You seem to have 2 GPUs installed along with a lot of HDDs. You can try removing both GPUs, and disconnecting the HDDs and running only off integrated graphics temporarily to see if performance improves.

As Lei pointed out, switching the NVMe slot the drive is in could help as well.



Hm, that's very interesting. That review has the 1TB NV2 with only 100 GB of cache whereas Tom's Hardware has the NV2 2TB with over 500 GB of cache.



Yes, SSDs use SLC for the cache because it's very fast and has extremely high endurance. That said, the cache recovery speed is based on the speed of the NAND used for the actual storage. The SLC cache can only write to the QLC as fast as the QLC can write, so in affect you get an SLC cache that fills up very quick and empties slowly. Typical QLC write speed is only 50-60 MB/s.
So pretty much akin a 15,000, 10,000 7,200, 5,400 HDD in the day.
 

Lei

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@evernessince
This NV2 is very weird. There are QLC (intel NAND) and TLC (toshiba) variants.

I'm thinking his slot might be defected. So he can just try the 3rd slot. Although his temps are bad and he thinks temp is not the issue.
 
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@evernessince
This NV2 is very weird. There are QLC (intel NAND) and TLC (toshiba) variants.

I'm thinking his slot might be defected. So he can just try the 3rd slot. Although his temps are bad and he thinks temp is not the issue.
I have read that above 60c+ is when they start throttling however the fact it is a single 90GB file he is copying over, I just don't think it has the cache to deal with more than the first 30GB or so, changing slots is a good idea to rule out anything else
 

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@evernessince
This NV2 is very weird. There are QLC (intel NAND) and TLC (toshiba) variants.

I'm thinking his slot might be defected. So he can just try the 3rd slot. Although his temps are bad and he thinks temp is not the issue.
I tested the temp looks like everyone skipping it

with 33c under load it didnt change

i will test slot to see if it will make a difference
 

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You are done then replace and move on
 
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So pretty much akin a 15,000, 10,000 7,200, 5,400 HDD in the day.

Exactly, it's equal to a very old HDD. On more modern HDDs you'll see 120 MB/s - 260 MB/s.

@evernessince
This NV2 is very weird. There are QLC (intel NAND) and TLC (toshiba) variants.

I'm thinking his slot might be defected. So he can just try the 3rd slot. Although his temps are bad and he thinks temp is not the issue.

Well that's unfortunate. Hard to recommend that drive when there is such a large difference between the variants.
 

MonsterMMORPG

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Exactly, it's equal to a very old HDD. On more modern HDDs you'll see 120 MB/s - 260 MB/s.



Well that's unfortunate. Hard to recommend that drive when there is such a large difference between the variants.
how can i know which variant is mine and what differences there are?
 
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afaik this SSDs has no DRAM Cache and is almost full.
if you have just a few GB left it can act up like that (like QLC SSDs after the SLC Cache is exhausted)
i have a TLC DRAM less SSD that drops heavily (50-60MB/s Write) when it's beyond 75%.
 

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afaik this SSDs has no DRAM Cache and is almost full.
if you have just a few GB left it can act up like that (like QLC SSDs after the SLC Cache is exhausted)
i have a TLC DRAM less SSD that drops heavily (50-60MB/s Write) when it's beyond 75%.
i see that is probably why
is my sandisk also same ?

i didnt see writing speed drop on it

Data tag on the module and a tool that can read info, maybe hwinfo64
this is what it shows

1685221533115.png



1685221662010.png
 
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Dude, that's just normal for your Hard Drive, that's why most people don't buy Kingston. Everyone buys the fastest and best models like a: Samsung 980Pro, Samsung 990Pro, WD Black SN850X, WD Black SN850
 

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I tested the temp looks like everyone skipping it

with 33c under load it didnt change
You are copying files at 66° and 71° degrees. Judging performance at these temps makes no sense.

Purchased NV2 2TB from Amazon Mexico

I didn't have heatsink to test it in the motherboard (X570), I can confirm that the drive under load went very fast to 60-65ºC and WHEN IT REACH 60ºC THE SPEED START TO DROP.
The drive start to throttle even inside the benchmarks tools ( you could see that in ATTO image)
Also in Crystaldiskmark write speed is affected with the built up heat of previous tests, once I tested secuencial write only with the drive cool and reached to 2700 MB/s
View attachment 289125
View attachment 289126

Then this are the results inside a FIDECO M203CP 10GBPS Enclosure. Using the case as heatsink (with thermal pad included) the temp maintained below 40ºC during the tests.

View attachment 289128
Well that's unfortunate. Hard to recommend that drive when there is such a large difference between the variants.
Here's how to find out:
To add a datapoint: I have a 500GB model of the NV2 I purchased 1 month ago. It is a SM2267XT with a Toshiba 112L TLC NAND.

Mainly using this NVME as a USB flash drive. I tried to use the Flash ID on the RTL9210B enclosure and it didn't work. I just plug it into my computer to get the drive specs.

I considered purchasing another 1TB NV2 for a friend's laptop since it stays relatively cool in an external enclosure but I am hesitant now due to the QLC swap. I have a Crucial P5 and it stays extremely hot in an external enclosure and PC. For a laptop a TLC version of NV2 would have been great since it doesn’t generate as much heat.

Deciphering the NAND: It seems like the following might be an accurate way to decipher between TLC/QLC for the NV2 series.

TLC drives has the following terms:
QLC drives has the following terms:

@MonsterMMORPG
When the cache is full, speed drops to 240 MBs:

QGvsSe8P2XjYRYjrdPZLdn-1200-80.png (2).jpg

here another very interesting test

i dont know what to tell

so it starts with 2 gb copy like 30
then drop downs to 100 mb

then increases and drop down again

check out the pictures

From C to F, you're reading. That's why the speed is consistent.
From F to C, you're writing, that's why you drop to 109 MBs (would have been 240 MBs if you were not so hot)

i see that is probably why
is my sandisk also same ?

i didnt see writing speed drop on it
SanDisk is 600tbw, so it's TLC. It's gen3 btw.
I couldn't find the spec to verify its cache. But SanDisk was acquired by Western Digital on 2015. So it must be awesome.

this is what it shows
You need this software:


SMI Nvme flash ID:

Run this, then you will get info like this:

flashid-png.png
 
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