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New Samsung 850 and new Samsung 860

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13 hours ago, continuum said:

You can read the Tom's Hardware article as well as the rest of us. ;) It has some educated guesses in there.


Regarding the 860, what is the difference from VNAND 3bit TLC used in the 850 EVO and the QLC used in the 860?

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Samsung 850, (64 layer TLC V-NAND) as the article says, is probably a 750 EVO (16nm planar TLC NAND) replacement. It does not appear to be an 850 EVO replacement.

Lets them shift everything away from planar TLC NAND to TLC V-NAND, which is better performing and cheaper to produce. QLC (4-bits per cell)  vs. TLC (3-bits per cell) when it does hit will further reduce the cost of NAND per bit, although it will come at the expense of durability, which is why only companies with established 3D NAND manufacturing processes (such as Samsung) are currently trying to tackle it in products ready for sale to end users.

 

The Anandtech review has a nice spec sheet and discussion on the 1st page:

https://www.anandtech.com/show/12085/the-samsung-ssd-850-120gb-review
https://www.samsung.com/us/business/oem-solutions/pdfs/V-NAND_technology_WP.pdf

 

This is an old article and it's on planar SLC vs. planar MLC vs. planar TLC (and hence doesn't address why 3D NAND is such a big help), but you should get the idea and be able to mentally scale it up to QLC...

https://www.anandtech.com/show/5067/understanding-tlc-nand

 

Not the in-depth primer on 3D NAND I was trying to find, but you might find the first few pages useful:
https://www.anandtech.com/show/8216/samsung-ssd-850-pro-128gb-256gb-1tb-review-enter-the-3d-era

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On 23/12/2017 at 6:05 AM, continuum said:

Samsung 850, (64 layer TLC V-NAND) as the article says, is probably a 750 EVO (16nm planar TLC NAND) replacement. It does not appear to be an 850 EVO replacement.

Lets them shift everything away from planar TLC NAND to TLC V-NAND, which is better performing and cheaper to produce. QLC (4-bits per cell)  vs. TLC (3-bits per cell) when it does hit will further reduce the cost of NAND per bit, although it will come at the expense of durability, which is why only companies with established 3D NAND manufacturing processes (such as Samsung) are currently trying to tackle it in products ready for sale to end users.

 

The Anandtech review has a nice spec sheet and discussion on the 1st page:

https://www.anandtech.com/show/12085/the-samsung-ssd-850-120gb-review
https://www.samsung.com/us/business/oem-solutions/pdfs/V-NAND_technology_WP.pdf

 

This is an old article and it's on planar SLC vs. planar MLC vs. planar TLC (and hence doesn't address why 3D NAND is such a big help), but you should get the idea and be able to mentally scale it up to QLC...

https://www.anandtech.com/show/5067/understanding-tlc-nand

 

Not the in-depth primer on 3D NAND I was trying to find, but you might find the first few pages useful:
https://www.anandtech.com/show/8216/samsung-ssd-850-pro-128gb-256gb-1tb-review-enter-the-3d-era

 

Please refresh my mind.
850 EVO uses TLC-VNAND
850 PRO uses MLC-VNAND

if this is right, what's the difference between the 850 EVO and the 850?

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Higher density (more layers) TLC V-NAND in the 850 vs. the earlier 850 EVO.

 

Samsung 850 uses 64 layers, 850 EVO uses 48 layers.

 

 

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On 5/1/2018 at 5:27 AM, continuum said:

Higher density (more layers) TLC V-NAND in the 850 vs. the earlier 850 EVO.

 

Samsung 850 uses 64 layers, 850 EVO uses 48 layers.

 

 

is there some advantages in more layers?

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The links above explain it thoroughly, I recommend you go through 'em. Particularly Anandtech's Samsung 850 120GB review above as well as a more in-depth on 3D V-NAND basis in Anandtech's Samsung 850 PRO review linked above.

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13 hours ago, continuum said:

The links above explain it thoroughly, I recommend you go through 'em. Particularly Anandtech's Samsung 850 120GB review above as well as a more in-depth on 3D V-NAND basis in Anandtech's Samsung 850 PRO review linked above.

I tought that the 850 was a cheaper 850EVO to replace the 750.

If this is not the case I think that the 850EVO has no sense anymore. Am I wrong?
Will 850EVO be discontinued in favour of the 850?

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It has been confirmed to be a 750 EVO replacement. Beyond that I don't know.

 

As far as replacement of the 850 EVO, no one seems to know. So far, Samsung's only released the 850 in a 120GB capacity and I think only in a few overseas markets. Maybe keep an eye on CES news (since CES is running right now) and see if any other Samsung 850 capacities have been released?

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