Sequential Read Performance

Our first test of sequential read performance uses short bursts of 128MB, issued as 128kB operations with no queuing. The test averages performance across eight bursts for a total of 1GB of data transferred from a drive containing 16GB of data. Between each burst the drive is given enough idle time to keep the overall duty cycle at 20%.

Burst 128kB Sequential Read (Queue Depth 1)

The burst QD1 sequential read performance of the Intel Optane SSD 900P falls in between the Samsung 960 PRO and 960 EVO. Samsung's fastest outperforms the Optane SSD by about 11%.

Our test of sustained sequential reads uses queue depths from 1 to 32, with the performance and power scores computed as the average of QD1, QD2 and QD4. Each queue depth is tested for up to one minute or 32GB transferred, from a drive containing 64GB of data.

Sustained 128kB Sequential Read

On the longer test of sequential read performance, the Optane SSD holds on to a commanding lead after the flash-based SSDs mostly slow down relative to their burst performance.

Both Optane devices show a jump in performance from QD1 to QD2, after which their performance holds steady. Samsung's 960s show very minor performance increases with queue depth, and at the highest queue depths the Intel SSD 750 comes closest to catching up to the Optane SSD.

Sequential Write Performance

Our test of sequential write burst performance is structured identically to the sequential read burst performance test save for the direction of the data transfer. Each burst writes 128MB as 128kB operations issued at QD1, for a total of 1GB of data written to a drive containing 16GB of data.

Burst 128kB Sequential Write (Queue Depth 1)

Samsung's 960 PRO and EVO drives all outperform the Intel Optane SSD 900P on the burst sequential write test, by up to 16%.

Our test of sustained sequential writes is structured identically to our sustained sequential read test, save for the direction of the data transfers. Queue depths range from 1 to 32 and each queue depth is tested for up to one minute or 32GB, followed by up to one minute of idle time for the drive to cool off and perform garbage collection. The test is confined to a 64GB span of the drive.

Sustained 128kB Sequential Write

On the longer sequential write test, the Optane SSD loses ground to Samsung's three fastest SSDs but everything else slows down even more.

Almost all of the SSDs in this bunch reach their full sequential write speed at QD2, and they are mostly differentiated by their speeds once saturated. A few drives show some unevenness during the later portions of the test, but the Optane SSD has just a minor blip in its favor at the end of the test.

Random Performance Mixed Read/Write Performance
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  • Nikijs - Monday, October 30, 2017 - link

    pls anand. just kill ddriver acc. he ruins all comment section. he's maybe "smart", but lives in another dimension, where he thinks he is only one who understands something. i bet he never ever achieved something worthy in his life. thats where all hidden anger comes from.
  • daremighty - Tuesday, October 31, 2017 - link

    I don't agree that Anandtech's approach to measure random performance. QD1 random is directly reflect the latency of memory chip (NAND or 3D Xpoint). Between the queue, there should be some idle time and it didn't explain the real random performance of device. Under random workload, the device should handle multiple random requests - it means deeper QD is more natural to explain the random performance of QD. Probably, many device would require deep QD to saturate the random, but I think it is still valid metric. I think in random, random performance with deep (64 or 128?) QD is as much important as low QD (1/2/4?). Again, low QD is just shows the NAND performance, not SSD performance.
  • rep_movsd - Tuesday, October 31, 2017 - link

    Seems like the great ddriver is an expert in all things, and his opinions of "Hypetane" are based on solid fact and "decades" of experience (of bashing intel I guess).
    All the people who buy Intel are idiots and those who praise Intel technology are shills...

    Meanwhile, Optane and similar technologies will eventually replace SSDs and ddriver will still be grumbling about how SLC would have been better if given a chance....

    Get with the times - no one is forcing anyone to buy anything Intel - and if you think anandtech fudges benchmarks, put your money where your mouth is and try doing a fraction of what they do...

    Don't pour cold water on others efforts just because you have some PTSD with Intel for whatever reason...

  • "Bullwinkle J Moose" - Tuesday, October 31, 2017 - link

    "Get with the times"

    Thats a great comment!

    Seems like ddriver might have gotten a timeout several days ago and yet a few of you can't seem to get over him

    Just admit it, you loved his comments and want him back, or else you could get with the times and get over him

    He's gone, but look at the bright side.....
    I'M BACK!
  • rep_movsd - Wednesday, November 1, 2017 - link

    Yes, I love him, like all trolls love other trolls
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  • DocNo - Saturday, November 4, 2017 - link

    Intel's caching software for Optane sucks - super finicky, not easy to integrate with an existing system and most of all requires specific motherboard to work (which I happened to have, but not the right partition layout - I dunno, technical documentation for what they want is pretty nonexistent).

    Luckily I stumbled PrimoCache. Downloaded a trial and had it working with my m2 Optane in 5 minutes. Made a noticeable and rather dramatic difference, even when loading stuff off of my Samsung EVO SSD. For $20 it was worth the frustration of not having to figure out Intel's poorly documented and overly fussy software. And if you don't have an Intel supported board, this lets you use Optane for caching with any board with an m2 slot.

    These Optane drives would be awesome for servers - based on the experience with my desktop I now use PrimoCache on a couple of my servers and even with cheap SSDs the difference is amazing. With larger Optane drives? I should be even better. And at $120 for the server version it's by far the fastest way to add SSD caching to Windows Server. I'm extremely happy with it!
  • weevilone - Sunday, November 5, 2017 - link

    That's interesting.. wish I had known about PrimoCache when I was tinkering with the little Optane stick. Intel's software was a huge mess, and Intel was less than helpful in working through it. When I finally went to remove it and throw in the towel, neither the software nor the UEFI could remove the stuff. I wound up having to reinstall Windows.
  • Kwarkon - Monday, November 6, 2017 - link

    I'm quite curious what exact issues you had, especially with disabling Optane?
  • mattlach - Saturday, December 30, 2017 - link

    Looking at that random 4k write performance, I'm thinking a pair of these would be absolutely fantastic as a mirrored SLOG/ZIL device for my massive ZFS pool. It's very tough to predict through.

    Question is how they would perform on the dual socket Westmere-EP Xeons powering my storage box, with only PCIe Gen2... Probably won't make a huge difference since the write speed peaks out at about 1.7GB/s and 4x PCIe Gen2 tops out at 2GB/s.

    I wouldn't mind a decent boost to sync write speeds, and this 900p seems like its tailor made for the job. No cache, so there is no need for battery/capacitor backup, and very high speed, low latency random writes...

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