Samsung ssd 850 evo (120gb, 250gb, 500gb & 1tb) review


Our Verdict

The fasdemo mainstream SSD around, just not necessarily one lớn shake the solid state world.

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The Samsung 850 EVO is the lathử nghiệm in its affordable line of performance SSDs & shows Samsung"s desire to push the solid state game along, even at the lower end of the price/performance stachồng.

When it comes lớn solid state drives Samsung has really nailed its colours lớn the mast; it"s going to lớn be first to lớn market with new technologies, it"s going to aggressively drive pricing down và it"s going lớn do it all alone.

To that over, the Samsung 850 Pro was the first consumer SSD khổng lồ show up with 3 chiều stacked memory making up its various components. The Samsung 850 Evo does this as well, using a new spin of the V-NAND tech for its more affordable range of SSDs. And, when we say affordable, we mean it – it’s one of the most value-minded SSDs on the market today.

This new line of SSDs uses a new generation of 3D V-NAND that revolves around piling chips on top of each other, with ‘through silinhỏ vias’ (TSV), which provides connections directly through the stack. This helps boost the bandwidth, as the connections are physically closer, but also means higher capađô thị drives are more affordable – they can be made without relying on the ever-shrinking of the NAND modules that ảo diệu SSDs.

This new generation of 3D V-NAND, then, has been designed khổng lồ forge a path to higher capathành phố SSDs in the coming years. Samsung’s second-gen 3 chiều V-NAND is made up of a full 32 layers stacked atop each other in every module. This means, the Samsung 850 Evo has a total density of 86Gbit.


Now, that"s not the highest density NAND you"ll find in today"s drives - both Crucial và Hãng Intel are throwing out drives with 128Gbit density NAND in them và have sầu partnered up lớn create their own 256Gbit 3D NAND for năm ngoái - but the difference is Samsung is only using 40nm silibé lớn get there.

Because of the celebrated shrinking of production processes in all spheres of computing - from processors lớn memory lớn graphics chips - it might at first seem lượt thích this is a backwards step.

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We have sầu, after all, become used to using 19nm NAND in our SSDs, even going as low as 16nm, so using a production process that"s more than twice as large would surely undo all the performance and efficiency boosts we picked up along the way down.

But because of 3D V-NAND"s ability to lớn hit these high densities with such chunky lithography, combined with the bandwidth boosts of the TSVs inside the stacked modules, the larger dies don"t have sầu any impact on relative sầu performance.

The efficiency gains from previous production shrinks are also largely offmix by the power reductions in the switch from 2 chiều to 3 chiều NAND.

Samsung estimates a 30% reduction in operational power with the Samsung 850 EVO compared with the older Samsung 840 EVO.

Hardy NAND

The 40nm process comes inkhổng lồ its own though when we start talking about endurance.

The biggest benefit is the fact the larger production processes are more reliable & longer-lived than their smaller descendants. When you"re making the switch, as Samsung is, from the 2-bit multi-layer cell (MLC) thiết kế of its higher-over 850 Pro to lớn the less-robust 3-bit MLC, any endurance boost is welcome.

Traditionally 3-bit MLC doesn"t last so long as the 2-bit kind, which is why you"ll see the Samsung 850 Pro rocking a full ten-year warranty.

With the 40nm 3-bit MLC of the Samsung 850 EVO it does have sầu a shorter five-year warranty, but that"s still a good giảm giá longer than the rest of the affordable SSD world with their three-year hedged bets.