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

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  • leexgx - Tuesday, July 7, 2015 - link

    SSDs don't shrink in size when they start to relocate pages (like HDDs they have spare area where they can remap to)
  • Impulses - Tuesday, July 7, 2015 - link

    No, it'd be 2,000 cycles on average before you start losing cells, as GTRagnarok pointed out... Either way, this is the same rating existing drives already had, so nothing has really changed and outside of bugs like the 840 EVO's there hasn't been any glaring issues (AFAIK).

    Why are you filling/emptying drives routinely? Just curious, you'd maintain optimal performance by never actually filling them completely... And if there's any sort of static data (OS) then there's also wear leveling involved.
  • kissiel - Tuesday, July 7, 2015 - link

    Dump stuff from SD cards, process them in batch, push further... .NEFs .MOVs and so on...
  • Oxford Guy - Tuesday, July 7, 2015 - link

    "maintain optimal performance"

    Hopefully for 850 EVO owners the slowdown problems from regular TLC won't rear their head.
  • Impulses - Wednesday, July 8, 2015 - link

    Hopefully not, but not filling up an SSD to capacity has nothing to do with those issues... All SSD will perform better if you never fill them up 100% or partition them in such a way that there's like 15-20% of empty overprovisioned space (in addition to whatever the manufacturer tends to build in).
  • Oxford Guy - Monday, July 13, 2015 - link

    "but not filling up an SSD to capacity has nothing to do with those issues"

  • watzupken - Tuesday, July 7, 2015 - link

    Honestly, 2TB of SSD is not for everyone. Personally for me, I feel 512GB is already quite a lot since I am running applications on it mostly. Don't like to waste space on SSD to store too many files since it doesn't come cheap.
  • meacupla - Tuesday, July 7, 2015 - link

    There was a time where I thought 256GB was plenty, and then some of these newer games started becoming 30~60GB a piece, at which point I ran out of room and deiced to upgrade to a 512GB.

    Also, large capacity SSDs have gotten quite a lot cheaper and hurts my wallet a lot less. It's what, less than $200 for a mid range 512GB these days.
  • chizow - Tuesday, July 7, 2015 - link

    These are nice for ultrabooks that still have 2.5" drives even though they're a dying breed. I know a few of our directors were asking about the 1.5TB EVO and >1TB Pros last upgrade cycle. I'll have to drop them a memo about the availability on these.
  • TheWrongChristian - Tuesday, July 7, 2015 - link

    Is that for their Pr0n stash? I can't imagine a non-media based work need for this much storage.

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