Due to what Samsung is citing as a surge in demand for larger capacity SSDs, they have now launched two new models offering up to two terabytes of storage each. In order to drive the extra capacity, they have also launched a new SSD controller in the MHX controller. Our resident SSD expert Kristian expects the MHX to be similar in design to the MEX controller, but with additional DRAM to track the extra blocks.

The 2TB 850 EVO leverages the same 32-layer 128 Gbit TLC V-NAND that we have already seen in the smaller capacity 850 EVO products, but the 850 PRO will use a new 128 Gbit 2-bit MLC die, but still at 32-layers. It should be a nice addition to the 850 PRO series, especially with the rise of 4K video and the extra storage it requires.

Samsung 2TB SSD Specifications
Model 850 PRO 850 EVO
Controller Samsung MHX
NAND Samsung 128Gbit 40nm MLC V-NAND 32-layers Samsung 128Gbit 40nm TLC V-NAND 32-layers
Sequential Read 550MB/s 540MB/s
Sequential Write 520MB/s 520MB/s
4KB Random Read 100K IOPS 98K IOPS
4KB Random Write 90K IOPS 90K IOPS
Power 5mW (DevSLP) / 3.3W (read) / 3.4W (write) 5mW (DevSLP) / 3.7W (read) / 4.7W (write)
Encryption AES-256, TCG Opal 2.0 & IEEE-1667 (eDrive supported)
Endurance 300TB 150TB
Warranty 10 years 5 years
Price $1000 $800

Samsung will still package these drives in the same 7mm 2.5” SSD enclosure which means they will be SATA based for now, but Samsung has said they will be moving their 3D NAND to mSATA and M.2 form factors as well. Endurance ratings for the drives are 10 years or 300 TBW (Terabytes Written) for the PRO, and 5 years or 150 TBW for the EVO model.

The 850 Pro retails for $1000, and the 850 EVO retails for $800. Although not inexpensive by any means, and still much more than the $75 of a spinning disk, the prices are right around double the 1TB models in the lineup so there is not any extra premium to get the larger models at this time.

Kristian should have a full review of the new models soon.


Source: Samsung



View All Comments

  • Nexing - Friday, July 10, 2015 - link

    Permit me to digress. Samsung 840s need their data oftenly rewritten otherwise there might be errors. And this retention issue means that -travellers- for instance, may not leave their laptops unattended several months because depending on their SSD they might lose relevant data. What about the accepted custom of leaving your personal/family photos or files to stay in what was originally stored at (so far HDs), now even finding decades old laptops somewhere at the house/warehouse. Until now we had the hope of retrieving hard disks. Now? ...Exactly there is a question mark here.
    To me, this is making explicit the lack of long term storage solutions, something several quitely-but decisively want to surprise! us all with the fact that is already at the cloud, and has been there for decades, hence trust everything to big brother. Where is High capacity durable Bluray optics at lost cost? There exist the need of personal/familiar long term safe storage medium, pronto!
  • canthearu - Friday, July 10, 2015 - link

    Note that this is the 850 EVO 850, not 840 EVO.

    As much as I think samsung are overrated, the 850 TLC series won't have the same kinds of retention problems the 840 TLC series suffered. The feature size on the 850 V-NAND is much larger than the that on the standard planar NAND Samsung uses.

    In terms of long term retention, we will probably be surprised. It isn't like USB flash drives suffer constant problems from this.

    In terms of keeping your data safe, you can never just throw it onto a device and forget about it. That is just asking for data loss. It has always been this way, and SSDs do not change this. Unless you monitor and renew your media, you are always risking failure and data loss.

    And yes, you can still get burnable DVDs and blu-rays. A blank blu-ray disk is a few dollars and they would be suitable for 10 year retention. It isn't as cheap as a hard drive, but if you need that shelf life, you have to choose your priorities.
  • Oxford Guy - Monday, July 13, 2015 - link

    "Samsung 840s need their data oftenly rewritten otherwise there might be errors." I believe this is the case with my 1 TB Apple-branded drive in my Macbook Pro. It's not unattended at all but old files I copied over when I first got the machine are having random problems. I believe the "Apple" ssd is a 1 TB Samsung 840 EVO. Reply
  • Beaver M. - Wednesday, July 8, 2015 - link

    When will the SATA Express ones arrive? Will they cost twice as much too? Reply
  • gohanrocs12 - Thursday, July 9, 2015 - link

    I called up Samsung. They said that the 850 drives are their last SATA based SSDs. They are moving onto mainly M.2 and possibly PCI-E SSDs for the future. Reply
  • Beaver M. - Sunday, July 12, 2015 - link

    Well, hopefully they will release bigger M.2 ones then. Their SM951 with 512 GB max. is useless to me and PCIe ones dont fit in my cases. Reply
  • TheUnhandledException - Saturday, July 11, 2015 - link

    Probably never. Sata Express is dead in the water. It was an interim step which didn't do enough. M.2 and U.2 is the future. Reply

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