Đánh giá ssd samsung 850 evo 250gb m2 năm 2024

Sorry, we just need to make sure you're not a robot. For best results, please make sure your browser is accepting cookies.

Type the characters you see in this image:

Try different image

Conditions of Use Privacy Policy

© 1996-2014, Amazon.com, Inc. or its affiliates

Today we’re looking at the M.2 version of Samsung’s popular 850 Evo SSD. We’ve already benchmarked the 2.5-inch 840 Evo and 850 Evo, so we’re curious to see how this smaller form factor shapes up. Thanks to Samsung, we’ve got our hands on a unit to serve in our XSR test rig, so let’s take a look!

---

Pros

• Pretty fast
• Super tiny Cons
• Not the fastest
• Limited to SATA speeds

---

Summary and Score

Based on our tests, the 850 Evo M.2 is a strong performer and a good choice for a small form factor PC or laptop where saving space is a large concern. Otherwise, we’d recommend sticking with the 2.5-inch version, which is currently £10 cheaper.

---

Specifications

• Interface: M.2 / SATA 6GB/s
• Sequential Read Speed: up to 540MB/s
• Sequential Write Speed: up to 500MB/s
• Capacity: 120 GB
• Memory Speed:
  • Samsung 32-layer 3D V-NAND
  • Samsung 512MB Low Power DDR3 SDRAM

---

Design

The nice thing about M.2 SSDs is that you can really take a look at them; there’s no case to get in the way. Of course, then you’re going to put it on a motherboard and never see it again until you upgrade, but it’s still nice to look at. We’ve already seen the front, so here’s the (more exciting) back of the drive.

Samsung have also prepared a nice box. n.b. these images are from the 500GB version; we’re looking at the 128GB version.

The five year warranty is a nice touch, and a fairly safe bet for Samsung given the sturdiness of solid state drives. Not having any moving parts is a pretty good way to avoid mechanical failures.

---

Benchmarks

As there’s little real-world analysis to be done, we’ll be strictly in benchmark land for the majority of this article. We’ll be testing the M.2 Samsung drive against three 2.5-inch SSDs — the Samsung 850 Evo, 840 Evo and Corsair Neutron GTX — in a battery of tests to see which is the fastest.

It’s worth noting that our other test subjects are 250GB, 1TB and 240GB, respectively, so there will be some variations, particularly in write speed.

The test rig has a Core i6 6600K processor, 16GB of DDR4 RAM and the OS is Windows 10.

Thanks to NZXT for providing the Manta case and Kraken X61 liquid cooler. Thanks to Samsung for providing the 850 Evo M.2 sample, and for allowing us to hang onto it for our future reviews! You’ll be seeing this drive again in our NZXT Manta review (coming soon), and hopefully for many more in the future.

It did well in our tests and showed that 3D NAND technology essentially brings TLC NAND to the level where planar MLC NAND stands today. The initial launch only included the most popular form factor in 2.5", but did not address the upgrade market where mSATA and M.2 are constantly growing in popularity. With today's release, Samsung is expanding the 850 EVO lineup with M.2 and mSATA models.

The move isn't really surprising because Samsung released an mSATA version of the SSD 840 EVO a bit over a year ago and when the 850 EVO was originally launched we were told that mSATA and M.2 models would follow later. The addition of M.2 is new to Samsung's retail lineup, but it makes a lot of sense given that many PC OEMs have switched from mSATA to M.2, and ultimately M.2 will be replacing mSATA in full.

Architecturally the mSATA and M.2 models are not any different from their 2.5" sibling. The heart of the drives is still Samsung's own MGX controller (excluding the 1TB model, which is powered by the older MEX controller) and the NAND is 32-layer 128Gbit TLC (3-bit per cell) V-NAND that is manufactured using 40nm lithography. TurboWrite (Samsung's pseudo-SLC caching) is also included and the cache sizes have remained unchanged from the 2.5" model. DevSleep and TCG Opal 2.0 (eDrive) are both supported too and endurance comes in at a respectable 75TB for 120GB/250GB and 150TB for 500GB/1TB models.

Given the similarity with the 2.5" model, I strongly suggest that you read our 850 EVO review for a full scope of TurboWrite, TLC V-NAND and other tidbits as I won't be covering those in detail in this review.

Samsung SSD 850 EVO mSATA Specifications Capacity 120GB 250GB 500GB 1TB Form Factor mSATA Controller Samsung MGX Samsung MEX NAND Samsung 40nm 128Gbit TLC V-NAND DRAM (LPDDR2) 512MB 1GB Sequential Read 540MB/s 540MB/s 540MB/s 540MB/s Sequential Write 520MB/s 520MB/s 520MB/s 520MB/s 4KB Random Read (QD1) 10K IOPS 10K IOPS 10K IOPS 10K IOPS 4KB Random Read (QD32) 95K IOPS 97K IOPS 97K IOPS 97K IOPS 4KB Random Read (QD1) 40K IOPS 40K IOPS 40K IOPS 40K IOPS 4KB Random Write (QD32) 88K IOPS 88K IOPS 88K IOPS 88K IOPS Steady-State 4KB Random Write Performance 3.1K IOPS 4.9K IOPS 6.8K IOPS 9.7K IOPS DevSleep Power Consumption 2mW 2mW 2mW 4mW Slumber Power Consumption 50mW Active Power Consumption (Read/Write) Max 3.5W / 4.3W Encryption AES-256, TCG Opal 2.0, IEEE-1667 (eDrive) Endurance 75TB (41GB/day) 150TB (82GB/day) Warranty Five years

Like its predecessor, the 850 EVO mSATA offers capacity of up to 1TB, which still remains the highest capacity mSATA drive in the industry. Samsung has a substantial lead in its NAND packaging technology because currently no-one else is shipping 16-die packages in high volume and by comparison Samsung has been doing this for quite some time now. I've heard Toshiba has some 16-die packages available, but the yields are very low and pricing comes in at about a dollar per gigabyte, whereas other packages are priced at ~30 cents per gigabyte. Micron also has 16-die packages on paper, but I've yet to see them used in any actual products.

Samsung SSD 850 EVO M.2 Specifications Capacity 120GB 250GB 500GB Form Factor M.2 2280 (single-sided; SATA 6Gbps) Controller Samsung MGX NAND Samsung 40nm 128Gbit TLC V-NAND DRAM (LPDDR2) 512MB Sequential Read 540MB/s 540MB/s 540MB/s Sequential Write 500MB/s 500MB/s 500MB/s 4KB Random Read (QD1) 10K IOPS 10K IOPS 10K IOPS 4KB Random Read (QD32) 97K IOPS 97K IOPS 97K IOPS 4KB Random Write (QD1) 40K IOPS 40K IOPS 40K IOPS 4KB Random Write (QD32) 89K IOPS 89K IOPS 89K IOPS Steady-State 4KB Random Write Performance 2.8K IOPS 4.1K IOPS 5.8K IOPS DevSleep Power Consumption 2mW 2mW 2mW Slumber Power Consumption 50mW Active Power Consumption (Read/Write) Max 2.4W / 3.5W Encryption AES-256, TCG Opal 2.0, IEEE-1667 (eDrive) Endurance 75TB (41GB/day) 150TB (82GB/day) Warranty Five years

Unfortunately the M.2 version tops out at 500GB. The reason lies in the fact that the M.2 is a single-sided design, which only has room for two NAND packages. There are quite a few laptops that use the single-sided M.2 2280 form factor as it allows for thinner designs, but I still would have liked to see a 1TB double-sided version. It is worth noting that while both PCIe and SATA based devices can have M.2 form factors, Samsung is only releasing the 850 EVO M.2 in the SATA format at this time.

With a 128Gbit die and sixteen die per package, the maximum capacity for each package comes in at 256GiB, yielding a raw NAND capacity of 512GiB, of which 500GB is usable in the 850 EVO.