Samsung SM951-NVMe (256GB) PCIe SSD Review
by Kristian Vättö on June 25, 2015 9:40 AM ESTSequential Read Performance
For full details of how we conduct our Iometer tests, please refer to this article.
In sequential read performance the SM951 NVMe is stronger than the SSD 750, but it's actually outperformed by the AHCI version. Given that the performance doesn't scale at all and doesn't reach the stated 2,200MB/s, I suspect there is some thermal throttling going on, which are not present in the SSD 750 and SM951 AHCI with heat sinks.
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Sequential Write Performance
The same throttling issue appears to be present in sequential write test where the SSD 750 is faster thanks to being able to scale performance with queue depth, whereas with the SM951 performance actually declines due to throttling.
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CrazyElf - Thursday, June 25, 2015 - link
@Kristian VättöDoes Windows 10 have better drivers for NVMe SSDs?
It is looking like right now that the SSD 750 might turn out to be the equal of the X-25 SSD in someday popularizing NVMe SSDs.
That being said, for the end consumer I'm not sure it matters as much over a SATA SSD. After all, the typical average user probably values the 4k @QD1/2 above all else, so perhaps these PCI-E SSDs will remain a niche product, unless the price reaches near parity with SATA SSDs, which won't happen for at least a few years.
The big advantage these PCI-E SSDs have is mostly sequential and for write-intensive work.
dgingeri - Thursday, June 25, 2015 - link
Windows 10 is still in development. They're still trying to improve things before the release day. I'm running the 10130 build, and it has many issues. I don't think it would be wise to do any benchmarks under the current Win10 build, and may not be good even under what gets released.hans_ober - Thursday, June 25, 2015 - link
Forget performance/benchmarks, even the UI is unstable. Window manager hangs, quits app. Many issues.Flunk - Thursday, June 25, 2015 - link
Try installing the production gpu drivers. The Beta ones that are automatically installed are quite crashy because they're still working on Direct X 12 support..Gigaplex - Thursday, June 25, 2015 - link
That doesn't apply in my case as I'm using a laptop with Intel graphics that aren't capable of DX12.nathanddrews - Friday, June 26, 2015 - link
Not sure which Intel graphics you have, but I was successful just installing the current 7/8.1 64bit drivers.AlenChakarov - Thursday, June 25, 2015 - link
Huh? Windows 10 has been rock-hard stable for me for quite a while now. Considering it's shipping a month from now, that's how it should be. Is your statement up-to-date?Gigaplex - Thursday, June 25, 2015 - link
I'm running the latest build, and I get a highly visible explorer crash every time I shut down or restart.Notmyusualid - Sunday, June 28, 2015 - link
BS.It is full of holes.
If there is one thing I've learned about software, if Microsoft say Beta, they really do mean it...
kmmatney - Thursday, June 25, 2015 - link
Yeah - I'm running the insider preview, and I'm a bit surprised at how rough things still are. It's stable - it just that a lot of thing don't work smoothly - especially with the App store and Modern Apps. My statement is up to date.