Question Which is the better M.2 SSD - - - Lexar NM790 NVMe 2TB or Kingston NV3 PCIe 4.0 NVMe 2TB ?

[USAFRet]

Motherboard B550-F Asus Rog Strix

You mean games do not use that type of data or for sequential read/writes?

Also you mentioned that 580 is an Old tech? could you please tell me in which way?

Sequential data....if you were a 10GB ISO file of a movie from one PCIe 4.0 drive to another PCIe 4.0 drive.
In normal, every day use (games), the files we see are much much smaller.

Running a CrystalDiskMark scan, the big number at the top is what is advertised.
But the smaller 4k numbers at the bottom are what really matter.

ex:
3 of the drives in my system.
Samsung 980 Pro, PCIe 4.0
Intel 660p, PCIe 3.0
Samsung 860 EVO, SATA III

The top line, outlined in blue, is what is advertised. "OMG! 10x FASTER!!"
The bottom line, outlined in red is where our actual daily ops happen. Incl and especially games.

 

[Daniel Youssef]

Sequential data....if you were a 10GB ISO file of a movie from one PCIe 4.0 drive to another PCIe 4.0 drive.
In normal, every day use (games), the files we see are much much smaller.

Running a CrystalDiskMark scan, the big number at the top is what is advertised.
But the smaller 4k numbers at the bottom are what really matter.

ex:
3 of the drives in my system.
Samsung 980 Pro, PCIe 4.0
Intel 660p, PCIe 3.0
Samsung 860 EVO, SATA III

The top line, outlined in blue, is what is advertised. "OMG! 10x FASTER!!"
The bottom line, outlined in red is where our actual daily ops happen. Incl and especially games.

Wow that is actually surprising, basically your slowest part which is the SATA would just be x2 less performant than your 980 Pro, but if someone were to view both based on read/writes they'd actually say it's around as much as x10 (which is not what would be needed for games)

So to sum up basically the Sequential data is for huge file moves? like moving 100GB of games or something, right? this is the only operation that I may find noticeable difference ?


I was viewing a channel that has reviewed the SN580 and did a benchmark comparing it to other SSDS, surprisingly, in gaming and other benchmarks, it is one of the highest scored SSDs.
Would you happen to know more about the SN580 WD? Have you seen reviews or anyone have it? is it really good and should I just go for it?

Note: I noticed that you disliked companies that change parts without notifying customers about it, While I was searching, I found Linus doing a video for the exact same thing on the SN550 WD

 

[USAFRet]

Wow that is actually surprising, basically your slowest part which is the SATA would just be x2 less performant than your 980 Pro, but if someone were to view both based on read/writes they'd actually say it's around as much as x10 (which is not what would be needed for games)

Exactly!

SSDs main benefit is the near zero access rate. Which holds across ALL SSD types.

So to sum up basically the Sequential data is for huge file moves? like moving 100GB of games or something, right? this is the only operation that I may find noticeable difference ?

Correct.

 

[Daniel Youssef]

Exactly!

SSDs main benefit is the near zero access rate. Which holds across ALL SSD types.


Correct.

So sorry, one last thing I forgot to ask is, does the sequential read/writes also affect things in games like shaders? (Whenever loading or compiling game shaders at the beginning)

If I get better read/writes then it would be even better for shaders or ?

 

[USAFRet]

So sorry, one last thing I forgot to ask is, does the sequential read/writes also affect things in games like shaders? (Whenever loading or compiling game shaders at the beginning)

If I get better read/writes then it would be even better for shaders or ?

A "faster" drive is rarely a bad thing, if everything else is equal. Price, warranty, etc, etc.

But it is unlikely you'd see any real user facing difference.

 

[thestryker]

Just something to keep in mind virtually every single manufacturer will swap out parts on cheaper SSDs. SK Hynix/Solidigm and Samsung are the only companies who use in house NAND and controllers which means they're less likely to be caught swapping components.

Lexar is not the company they used to be as they're a subsidiary of a Chinese memory company now. Their drives are very cheap, but I don't that know the current designs have been on the market long enough to really say whether or not they're a good buy.

Personally speaking I've only used SK Hynix, Solidigm, Samsung and Western Digital. Depending on regional costs the SN770 from WD is a great DRAMless drive. The Solidigm P41 Plus is a decent QLC drive if the price is cheap enough.

 

[Daniel Youssef]

A "faster" drive is rarely a bad thing, if everything else is equal. Price, warranty, etc, etc.

But it is unlikely you'd see any real user facing difference.

But in essence the sequential read/writes dont really affect shader loading as part of it ? It is how fast in benchmarks and other aspects of the storage itself?

Just something to keep in mind virtually every single manufacturer will swap out parts on cheaper SSDs. SK Hynix/Solidigm and Samsung are the only companies who use in house NAND and controllers which means they're less likely to be caught swapping components.

Lexar is not the company they used to be as they're a subsidiary of a Chinese memory company now. Their drives are very cheap, but I don't that know the current designs have been on the market long enough to really say whether or not they're a good buy.

Personally speaking I've only used SK Hynix, Solidigm, Samsung and Western Digital. Depending on regional costs the SN770 from WD is a great DRAMless drive. The Solidigm P41 Plus is a decent QLC drive if the price is cheap enough.

So Lexar is pretty much not the same and their controller parts may not be the best (since it is vague what they use). You mentioned WD SN770 but currently it is only available as 1TB here, the 2TB is not really available and based on prices it is close to 200$ in my region, what's you opinion on the SN580 ?

 

[Daniel Youssef]

I forgot to mention this SSD,
XPG GAMMIX S70 BLADE 2TB

Which is also at the same price of the Lexar (151$) , what is your opinion on this as well?

 

[thestryker]

So Lexar is pretty much not the same and their controller parts may not be the best (since it is vague what they use). You mentioned WD SN770 but currently it is only available as 1TB here, the 2TB is not really available and based on prices it is close to 200$ in my region, what's you opinion on the SN580 ?

Looks like the SN580 is pretty similar to the SN770 mostly just slower sequential. WD also specifies that they're using their own TLC NAND which should mean it's a pretty safe buy in terms of getting the same device as reviewers did a year or more ago. I think it would be a good budget secondary SSD buy.

The XPG drive you mentioned doesn't have very clear specifications so I wouldn't be surprised if performance varied.

 

[Daniel Youssef]

Looks like the SN580 is pretty similar to the SN770 mostly just slower sequential. WD also specifies that they're using their own TLC NAND which should mean it's a pretty safe buy in terms of getting the same device as reviewers did a year or more ago. I think it would be a good budget secondary SSD buy.

The XPG drive you mentioned doesn't have very clear specifications so I wouldn't be surprised if performance varied.

Im sorry for asking but all i know about QLC or TLC is that they store bits or voltage in different ways, why would that mean that it is more reliable ?

 

[thestryker]

Im sorry for asking but all i know about QLC or TLC is that they store bits or voltage in different ways, why would that mean that it is more reliable ?

It's the number of bits per cell that's being referred to and QLC has lower overall write capacity while also being slower (there are ways to mitigate it, but relatively little of this is implemented at the consumer level).

The reason I noted WD citing their own TLC is that a lot of the more budget oriented drives don't really specify performance or say what their NAND is. This allows them to substitute whatever happens to be the best price after the first run of the drives. That's why you might hear stories of people getting varied performance out of the same drive. In the case of the SN580 they do specify the NAND and multiple performance metrics which means all of the drives should be the same.