SSD Difference & Suggestions.

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Deal Lieutenant
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SSD Difference & Suggestions.

Laptop Model : Lenovo U41-70

1) What’s the difference between these models?

2) Are both compatible with U41-70 ?

https://www.amazon.in/dp/B078211KBB/ref=cm_sw_r...


https://www.amazon.in/dp/B077SF8KMG/ref=cm_sw_r...

Please suggest any if other good option.

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Be sure to get one with DRAM cache. Mx500 is great. Samsung 860 Evo too

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cr1mzn wrote:

Be sure to get one with DRAM cache. Mx500 is great. Samsung 860 Evo too

Dram not mentioned in Product details on amazon.
+ Mixed Response given by users in Questions section.(Some People says it has Dram, few says it don’t have)

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Angry_Bird wrote:

Dram not mentioned in Product details on amazon.
+ Mixed Response given by users in Questions section.(Some People says it has Dram, few says it don’t have)

Difficult to find info on this but 3D NAND is always TLC chips and those have bad write quality.. 200 cycles compared to 2000 for MLC.. My old crucial 256GB (MLC) drive had 100TB of writes already and shows like 80% life left but my new samsung (TLC) life is only 70TB and already 50% dead..

Some cheap ones use part of the chip itself and some allow you to set the size.. So 1 TB drive would lose like 50GB as a cache but this is SLC cache so would go down to 15GB or so.. So any DRAM cache helps out a lot.. Micron also has a program for the computer to act as a cache.. Read techno review sites to find info on particular drives as it is very complex..

The second link drive has this… Fly through everything you do: Our Dynamic Write Acceleration technology uses an adaptable pool of high-speed, single-level cell flash memory to generate blistering speeds. So it would take 100GB TLC or so and turn the TLC to like 25GB SLC to use as a cache.. Reviewers have special tools to check such things..

ps.. my cruicial shows r/w speeds of 250MB/sec about as fast as a HD and the samsung shows 500MB speeds.. But I have not noticed any difference in usage between them in anything..

ps.. my cruicial shows r/w speeds of 250MB/sec about as fast as a HD and the samsung shows 500MB speeds.. But I have not noticed any difference in usage between them in anything..

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Angry_Bird wrote:

Dram not mentioned in Product details on amazon.
+ Mixed Response given by users in Questions section.(Some People says it has Dram, few says it don’t have)

It has DRAM, all ssd manufacturers have a cheaper dram-less series & a costlier dram series ssd. In case of crucial their BX series is dram less while MX series comes with dram. For future reference, see reviews on international tech sites like tomshardware & anandtech.

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alienteck wrote:

Difficult to find info on this but 3D NAND is always TLC chips and those have bad write quality.. 200 cycles compared to 2000 for MLC.. My old crucial 256GB (MLC) drive had 100TB of writes already and shows like 80% life left but my new samsung (TLC) life is only 70TB and already 50% dead..

Some cheap ones use part of the chip itself and some allow you to set the size.. So 1 TB drive would lose like 50GB as a cache but this is SLC cache so would go down to 15GB or so.. So any DRAM cache helps out a lot.. Micron also has a program for the computer to act as a cache.. Read techno review sites to find info on particular drives as it is very complex..

The second link drive has this… Fly through everything you do: Our Dynamic Write Acceleration technology uses an adaptable pool of high-speed, single-level cell flash memory to generate blistering speeds. So it would take 100GB TLC or so and turn the TLC to like 25GB SLC to use as a cache.. Reviewers have special tools to check such things..

ps.. my cruicial shows r/w speeds of 250MB/sec about as fast as a HD and the samsung shows 500MB speeds.. But I have not noticed any difference in usage between them in anything..

ps.. my cruicial shows r/w speeds of 250MB/sec about as fast as a HD and the samsung shows 500MB speeds.. But I have not noticed any difference in usage between them in anything..

You are confusing “warranty write endurance” with “real world write endurance”, techreport did a ssd endurance test few years ago where they have shown that samsung 840 TLC ssd drive survived till 900TB of writes & since then samsung has only improved their TLC tech with latest launched 870 evo series. You can rest assured that despite showing 50% dead in samsung magician/similar software your ssd(assuming it is samsung 850/860/870 evo) won’t be dying before crossing at least 600-700TB.

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guest_999 wrote:

It has DRAM, all ssd manufacturers have a cheaper dram-less series & a costlier dram series ssd. In case of crucial their BX series is dram less while MX series comes with dram. For future reference, see reviews on international tech sites like tomshardware & anandtech.

Okay thanks pray

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guest_999 wrote:

You are confusing “warranty write endurance” with “real world write endurance”, techreport did a ssd endurance test few years ago where they have shown that samsung 840 TLC ssd drive survived till 900TB of writes & since then samsung has only improved their TLC tech with latest launched 870 evo series. You can rest assured that despite showing 50% dead in samsung magician/similar software your ssd(assuming it is samsung 850/860/870 evo) won’t be dying before crossing at least 600-700TB.

Intel will lock your drive into read only mode once it reaches its limits..

I am not up with the latest but I had a test report and none of them went to 500TB+ on their 256GB drives.. Most failed around 200+TB mark and thats for MLC.. I would think TLC would be less than half that..

surprised at these results.. 4000PE cycles is far higher than the expected 500 cycles..

https://techreport.com/review/27909/the-ssd-end...

TLC drives

https://techreport.com/review/27909/the-ssd-end...

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alienteck wrote:

Intel will lock your drive into read only mode once it reaches its limits..

I am not up with the latest but I had a test report and none of them went to 400GB+ on their 256GB drives.. Most failed around 200GB mark and thats for MLC.. I would think TLC would be less than half that..

surprised at these results.. 4000PE cycles is far higher than the expected 500 cycles..

https://techreport.com/review/27909/the-ssd-end...

TLC drives

https://techreport.com/review/27909/the-ssd-end...

That is what happened with improvement in technology, samsung has perfected the TLC tech to such an extent that their TLC ssd’s real world write endurance is multiple times higher than warranty endurance. Crucial is also not far behind, today you can get any good TLC ssd & irrespective of its warranty endurance can expect it to survive at least 600-700TB of writes.

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Counter-intuitively, the TLC-based Samsung 840 Series outlasted those MLC casualties to write over 900TB before failing suddenly. But its reallocated sectors started piling up after just a few hundred terabytes of writes, confirming TLC’s more fragile nature.

Interesting.. Seems they are using some tricks not used in older MLC drives to be able to write more data with TLC chips even though endurance is less than half..

Missing