Samsung has announced the third generation of their high-end consumer NVMe SSDs. The new 970 PRO and 970 EVO M.2 NVMe SSDs use a newer controller and Samsung's latest 64-layer 3D NAND flash memory. The outgoing 960 PRO and 960 EVO were first announced in September 2016 and shipped that fall, so they have had a fairly long run as Samsung's flagship consumer SSDs.

There are no big surprises from today's announcement. Samsung's transition to 64-layer 3D NAND has been underway for a year, and the retail SATA lineup migrated to the fourth-generation 3D NAND earlier this year. This generation of NAND includes a 512Gb TLC die that allows for 1TB in a single BGA package, so squeezing 2TB onto a single-sided M.2 2280 card is no longer a challenge.

The Samsung Phoenix controller used in the 970s has been on our radar for a long time after appearing on many of Samsung's recent NVMe SSDs for other markets: the PM981 client SSD for OEMs, the PM983 enterprise SSD that is being used to promote Samsung's new NF1 (formerly NGSFF) form factor, and the high-end enterprise Z-SSD SZ985.

Read Our Samsung PM981 SSD Review

Samsung's retail NVMe SSD product numbering is now out of sync with their OEM and enterprise SSDs. This is because the Samsung PM971 wasn't a direct replacement for anything in the 96x generation. Instead, the PM971 is a low-end BGA SSD featuring Samsung's Photon controller instead of the 96x generation's Polaris or the current Phoenix. BGA SSDs are obviously not a good fit for the retail SSD market, and even when mounted on M.2 cards the PM971 would have had a fairly small audience. Samsung's retail NVMe SSDs aren't skipping over the 970 generation, but their other high-end NVMe drives did.

Samsung is still using MLC NAND for the PRO series and TLC NAND for the EVO series. However, it is clear that the TLC-based EVO is the more important product for Samsung. The PRO series has been reduced back down to just two capacities (512GB and 1TB), while the EVO now spans from 250GB up to 2TB. The EVO series now also matches the PRO's 5-year warranty term. Other manufacturers have started to abandon MLC NAND completely for their consumer product lines. Samsung isn't quite there yet, but the PRO is looking like even more of a niche product this time around. We have not seen a MLC-based SM981 drive, so it seems likely that the client OEM product line is done using MLC NAND.

Samsung 970 EVO Specifications
Capacity 250 GB 500 GB 1 TB 2 TB
Interface PCIe 3 x4 NVMe 1.3
Form Factor M.2 2280 Single-sided
Controller Samsung Phoenix
NAND Samsung 64-layer 256Gb 3D TLC Samsung 64L 512Gb 3D TLC
SLC Write Cache Dedicated 4 GB 4 GB 6GB 6 GB
Dynamic 9 GB 18 GB 36 GB 72 GB
Sequential Read 3400 MB/s 3500 MB/s
Sequential Write (SLC Cache) 1500 MB/s 2300 MB/s 2500 MB/s 2500 MB/s
Sequential Write (TLC) 300 MB/s 600 MB/s 1200 MB/s 1250 MB/s
4KB Random Read  QD1 15k IOPS
QD128 200k IOPS 370k IOPS 500k IOPS 500k IOPS
4KB Random Write  QD1 50k IOPS
QD128 350k IOPS 450k IOPS 450k IOPS 480k IOPS
Active Power Read 5.4 W 5.7 W 6 W 6 W
Write 4.2 W 5.8 W 6 W 6 W
Idle Power APST On 30 mW
PCIe L1.2 5 mW
Write Endurance 150 TB 300 TB 600 TB 1200 TB
Warranty 5 years
MSRP $119.99 (48¢/GB) $229.99 (46¢/GB) $449.99 (45¢/GB) $849.99 (42¢/GB)

We were impressed with the PM981 drives we had the opportunity to test in November. We found that the combination of updated NAND and the new Phoenix controller provided a solid generational boost over the 960 EVO, often bringing performance up to the level of the 960 PRO and occasionally surpassing it. The retail 970s are a bit overdue, because several recent competing NVMe SSDs had made it clear that the 960s were losing the lead. The 970 EVO on its own probably won't be enough for Samsung to reestablish an undisputed lead in M.2 SSD performance.

Compared to its predecessor, the 970 EVO promises a small improvement in sequential read speed, and a more substantial boost to sequential write speed for all but the smallest 250GB model. Peak random access performance is also substantially improved, but again the 250GB model gets left out, and is actually rated as slower than the 960 EVO 250GB.

The warranty on the EVO has been extended from three years to five years, and the write endurance ratings have been increased by 50% to retain almost the same drive writes per day rating.

The 970 EVO will debut with prices slightly lower than the launch MSRPs for the 960 EVO. In between the two product launches, a severe industry-wide shortage of flash memory kept prices high, but now that most NAND flash manufacturers have their 64L 3D NAND production in full swing, retail prices are improving.

Samsung has dropped the 2TB option from the PRO lineup, replacing it with a 2TB 970 EVO that is about a third cheaper and will likely be much more popular. That 2TB 970 EVO is the only model using Samsung's 512Gb 64L 3D TLC die, while the smaller models use the 256Gb version.

Samsung 970 PRO Specifications
Capacity 512 GB 1 TB
Interface PCIe 3 x4 NVMe 1.3
Form Factor M.2 2280 Single-sided
Controller Samsung Phoenix
NAND Samsung 64-layer 3D MLC V-NAND
Sequential Read 3500 MB/s
Sequential Write 2300 MB/s 2700 MB/s
4KB Random Read  QD1 15k IOPS
QD128 370k IOPS 500k IOPS
4KB Random Write  QD1 55k IOPS
QD128 500k IOPS
Active Power Read 5.2 W
Write 5.2 W 5.7 W
Idle Power APST On 30 mW
PCIe L1.2 5 mW
Write Endurance 600 TB 1200 TB
Warranty 5 years
MSRP $329.99 (64¢/GB) $629.99 (62¢/GB)

The 970 PRO's performance specs aren't too different from the 970 EVO. Many of the ratings are the same, and the ones that differ are mostly better by just 3-11% for the PRO. There are just two major exceptions to this. First, the PRO doesn't rely on SLC write caching so it can maintain its write speed far longer than the EVO. Second, the rated write endurance of the 970 PRO is twice that of the EVO, going from just over 0.3 Drive Writes Per Day to 0.6 DWPD. Neither of these are an important factor for ordinary consumer use cases, but they help the 970 PRO retain some shine as a premium product.

The 970 PRO's improvements over the 960 PRO are mostly for random I/O performance, where both drives are now rated to hit 500k IOPS for random writes, given sufficient queue depth. As with the EVO, rated write endurance has been increased by 50%, but the PRO's warranty remains at 5 years. The MSRPs for the 970 PRO are the same as the the launch prices for the 960 PRO.

The 970 PRO and 970 EVO will be available for purchase worldwide beginning May 7, 2018.

Related Reading

Comments Locked


View All Comments

  • ಬುಲ್ವಿಂಕಲ್ ಜೆ ಮೂಸ್ - Tuesday, April 24, 2018 - link

    I have a compact flash card that boots Windows XP faster than these things
  • Billy Tallis - Tuesday, April 24, 2018 - link

    Considering that Windows XP won't boot off of these things, I'm inclined to believe you. But that's not relevant to anyone who doesn't share your obsessions.
  • anactoraaron - Tuesday, April 24, 2018 - link

    Only difference I see from the 960 EVO is improved SLC and a better warranty. Once you go beyond that cache there's no difference at all.
  • iuli - Tuesday, April 24, 2018 - link

    i have read this article:

    so, isnt the SLC from the EVO better than the MLC fromthe PRO?
  • vortmax2 - Tuesday, April 24, 2018 - link

    The EVO has TLC, not SLC.
  • twotwotwo - Tuesday, April 24, 2018 - link

    The tricky bit is the EVO uses a *little* Flash as SLC but mostly uses TLC. If you've got bursts of writes the SLC cache can handle them; if you sustain sequential writes for a long time, eventually it has to write to TLC which is slower than the MLC. Looking at those spec charts, the MLC drive is apparently fine without an SLC cache in practice; dunno, maybe it can get more MLC writes going in parallel since it's not a limited-size cache.

    For most consumer or even workstation uses, I don't think you're gonna notice any difference. If for some weird reason I had to run a database on consumer drives, the PRO's endurance and sustained performance would count for something. But as someone who grew up with computers using HDDs, it's hard to go wrong with any halfway decent SSD today.
  • Chaser - Tuesday, April 24, 2018 - link

    I am a high-end gamer 1st and a home productivity user second. I tested the Intel Optane 900P and the 960 PRO up against my Patriot Hellfire. I saw no appreciable difference between the 3 in my day to day use. My understanding is that even Windows 10 core is still designed around conventional hard drive use. But I could be wrong. If my Hellfire goes out I'd buy this new EVO to replace it probably.
  • Gnomer87 - Thursday, April 26, 2018 - link

    You're definitely on to something there. I have an 960 evo. I noticed when copying large amount of small files, performance would turtle.

    My understanding of SSDs is that they shouldn't be anywhere near as bad as harddrives when it came to such tasks, yet I saw performance remeniscent of harddrives.

    Here's what I did: I had a small react project. The project has 47000 files, autogenered by NPM, while the whole folder is 320 MBs, so a massive amount of very small files. Copying that folder to another location on the drive is extremely slow, so I opened my task manager so I could monitor the resource use while it worked. First off: You'll see the CPU is barely allowed to work on the windows explorer process, instead something called Antimalware Service Executable hogs the CPU. Windows Explorer gets about 5-6% of the CPU time. That antimalware process starts hogging the moment I started copying.

    In addition, Windows Explorer doesn't seem to be very smart about it, it still copies only one file at the time, something that makes sense for harddrives, but not SSDs.

    To make sure I was sane, I packed that same folder using winrar, and then proceded to copy that file. Performance is then as advertized, instead of ~1MB per second, I saw those magical 1.5 GBs per second I was promised, though I had to make a bigger file for that to pop up.

    In short, windows is extremely inefficent when copying large amounts of very small files. Main reason appears to be the antimalware measures they have going, another is inefficient design of the windows explorer app.
  • mnelsoneorm - Tuesday, May 8, 2018 - link

    Use Robocopy instead of explorer :)
  • 0ldman79 - Monday, June 11, 2018 - link

    I'm surprised no one else commented, Antimalware Service Executable is Windows Defender scanning each file as it is queued before it is copied.

    The older AV programs used to scan, say My Documents, once, then ignore until a certain amount of time had passed, maybe once a day. Windows Defender scans the folder with the real time scanner every single time you open the folder. Most AV do these days. I don't run a realtime scanner any more and have scheduled full scans few times a week.

Log in

Don't have an account? Sign up now