1TB 860 EVO £140
1TB 870 QVO £60
1TB 870 EVO £85
(rough prices - cheapest I've found so far) any reason for the big
difference in prices?
Mark <captain.black@gmail.com> wrote:
1TB 860 EVO £140
1TB 870 QVO £60
1TB 870 EVO £85
(rough prices - cheapest I've found so far) any reason for the big
difference in prices?
QVO uses QLC flash - four bits per cell so 16 discrete voltage levels. EVOs are usually TLC - three bits per cell / 8 voltage levels. QLC is slower and less robust - more like a halfway house between SSD and spinning disc.
I'd go for the TLC every time. As to the difference between 860 and 870, possibly the older model uses an older / larger geometry silicon process so costs more to make. So I can't see much of a reason for the 860 and would
go for the 870 EVO.
(very possibly the 860 would be more robust in terms of cosmic rays or something, but I wouldn't worry about it)
Anandtech is generally the place I go for flash reviews: https://www.anandtech.com/show/16480/the-samsung-870-evo-ssd-1tb-4tb-review
Theo
On 2023-01-10 21:53:59 +0000, Theo <theom+news@chiark.greenend.org.uk>
said:
Mark <captain.black@gmail.com> wrote:
1TB 860 EVO £140
1TB 870 QVO £60
1TB 870 EVO £85
(rough prices - cheapest I've found so far) any reason for the big
difference in prices?
QVO uses QLC flash - four bits per cell so 16 discrete voltage
levels. EVOs
are usually TLC - three bits per cell / 8 voltage levels. QLC is
slower and
less robust - more like a halfway house between SSD and spinning disc.
I'd go for the TLC every time. As to the difference between 860 and 870, >> possibly the older model uses an older / larger geometry silicon
process so
costs more to make. So I can't see much of a reason for the 860 and
would
go for the 870 EVO.
(very possibly the 860 would be more robust in terms of cosmic rays or
something, but I wouldn't worry about it)
Anandtech is generally the place I go for flash reviews:
https://www.anandtech.com/show/16480/the-samsung-870-evo-ssd-1tb-4tb-review >>
Theo
Cool - thanks for the info. I did just find a website that went into a
little detail <https://www.digitaltrends.com/computing/samsung-qvo-vs-evo-guide/> Says
QVO are more a 'budget' line (fewer writes, less longevity, better for
reads rather than writes). Not sure how - or if - that would affect me though. Anand looks quite a bit more detailed - thanks.
On 10/01/2023 22:15, Mark wrote:
On 2023-01-10 21:53:59 +0000, Theo <theom+news@chiark.greenend.org.uk>
said:
Mark <captain.black@gmail.com> wrote:
1TB 860 EVO £140
1TB 870 QVO £60
1TB 870 EVO £85
(rough prices - cheapest I've found so far) any reason for the big
difference in prices?
QVO uses QLC flash - four bits per cell so 16 discrete voltage
levels. EVOs
are usually TLC - three bits per cell / 8 voltage levels. QLC is
slower and
less robust - more like a halfway house between SSD and spinning disc.
I'd go for the TLC every time. As to the difference between 860 and 870, >>> possibly the older model uses an older / larger geometry silicon
process so
costs more to make. So I can't see much of a reason for the 860 and
would
go for the 870 EVO.
(very possibly the 860 would be more robust in terms of cosmic rays or
something, but I wouldn't worry about it)
Anandtech is generally the place I go for flash reviews:
https://www.anandtech.com/show/16480/the-samsung-870-evo-ssd-1tb-4tb-review >>>
Theo
Cool - thanks for the info. I did just find a website that went into a
little detail
<https://www.digitaltrends.com/computing/samsung-qvo-vs-evo-guide/> Says
QVO are more a 'budget' line (fewer writes, less longevity, better for
reads rather than writes). Not sure how - or if - that would affect me
though. Anand looks quite a bit more detailed - thanks.
QLC makes it easier to manufacture higher capacity devices. I'd go for
the 870 EVO..
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