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XPS007
1 Copper

XPS 8700, Samsung 950 Pro, low performance

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Hi, how are you?

I have an XPS 8700 with three storage units, 2 M2 SSDs and an HDD.
The main disk is a Samsung Evo 850 and the other SSD is a Samsung 950 Pro NVMe. When I have done the benchmark test the Evo 850 yields very high results, more than I would expect, however the 950 Pro qualifies well below the expected and this is the reason why I do not have it assigned as the main disk and it is connected to my PC through a SilverStone Technology SST-ECM20 Dual M2 to PCI-E X4.
I would like to know if someone finds any error in my configuration where this is happening.
Thanks and regards

Screenshot_2.jpg

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Tesla1856
6 Thallium

Re: XPS 8700, Samsung 950 Pro, low performance

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@XPS007 wrote:

Yes, now I have tried to do a test with Crystal Disk-Mark and there seems to be more congruence although I honestly do not know the proper way to interpret these numbers


You're a good sport.

Looks about the same to me (same strangeness). So, it had nothing to do with Samsung Magician.

My take on this is that since both drives are connected through the SilverStone SST-ECM20 ... it is somehow (incorrectly) reversing-or-switching the drive identities.

The mSATA is still low for SATA-SSD but that might be the SSD itself or the SiverStone card (slowing it down). A more normal 2.5 inch SATA-3/600 SSD (connected directly to a motherboard SATA port) would likely be 2x faster.

And if those other numbers are true, they are crazy-good (if even possible). Again, might be the SilverStone card pulling that off, or on some Samsung drives, (IIRC) they can do some driver-trickery. Still, never seen one that fast. 


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XPS007
1 Copper

Re: XPS 8700, Samsung 950 Pro, low performance

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I have installed the 950 Pro EVO on my Latitude E7470 as a C disk and it is running pretty well so I think there was a problem with the PCIe adapter I was using in my XPS as you told me from the beginning and the Samsung 850 EVO works very well from the M2 slot so I consider the problem solved. I put the last Benchmarks of both machines.
CheersLatitude Benchmark 950 Pro.jpg950 Pro now on my Latitude E7470XPS Benchmark 850 EVO.jpg850 EVO on my XPS

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12 Replies
Tesla1856
6 Thallium

Re: XPS 8700, Samsung 950 Pro, low performance

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So, you got one of those NVMe SSD's on that PCIe card to be the bootable Windows drive C: ?

Anyway, PCIe x4 (slot and card) is good, but do you think it is enough bandwidth to run TWO NVMe SSDs at full speed ?

Isn't that old machine's version of PCIe one of the (older) slower versions ... like v2.0 maybe ?

Maybe try the 850-Pro by itself (on on it's own PCIe slot) ?


Registered Microsoft Partner and Apple Developer
- Like many of you, I can appreciate a good game-engine.
- I answer questions here, but I'm not a Dell employee.
- Consider giving posts you like a "thumbs-up"
- Posting models-numbers and software versions speeds trouble-shooting.
- Click "Accept as Solution" button on any post that answers your question best.
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XPS007
1 Copper

Re: XPS 8700, Samsung 950 Pro, low performance

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Hi Tesla,
Thanks for your quick reply.
The 850 Evo is my bootable drive C and is working quite well connected through mSata slot. I just ask myself why the 950 Pro is not performing well through the PCIe x4. (Maybe it's a slower version like 2.0)
Anyway I don't understand too much of these things unfortunately

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Tesla1856
6 Thallium

Re: XPS 8700, Samsung 950 Pro, low performance

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@XPS007 wrote:


1. The 850 Evo is my bootable drive C and is working quite well connected through mSata slot.

2. I just ask myself why the 950 Pro is not performing well through the PCIe x4. (Maybe it's a slower version like 2.0). Anyway I don't understand too much of these things unfortunately


1. OK, I understand now.

2. There are various reasons why.

But before all that ... why don't you tell us what Crystal DiskMark says the sequential r/w speed is on the 950-Pro-NVMe .


Registered Microsoft Partner and Apple Developer
- Like many of you, I can appreciate a good game-engine.
- I answer questions here, but I'm not a Dell employee.
- Consider giving posts you like a "thumbs-up"
- Posting models-numbers and software versions speeds trouble-shooting.
- Click "Accept as Solution" button on any post that answers your question best.
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7- Thorium

Re: XPS 8700, Samsung 950 Pro, low performance

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There is no way you are getting 4766 from MSATA

so there's something wrong with the pictures.

https://crystalmark.info/en/

https://www.techspot.com/review/969-samsung-850-evo-m2-msata/page5.html

 

 

 


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Tesla1856
6 Thallium

Re: XPS 8700, Samsung 950 Pro, low performance

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Now that your first picture is finally approved and viewable to us ...

Like @speedstep  says, those pics are very strange (in various ways).

I think either you or (that version of) Samsung Magician is confused about what is inside that machine, and how they get measured.


Registered Microsoft Partner and Apple Developer
- Like many of you, I can appreciate a good game-engine.
- I answer questions here, but I'm not a Dell employee.
- Consider giving posts you like a "thumbs-up"
- Posting models-numbers and software versions speeds trouble-shooting.
- Click "Accept as Solution" button on any post that answers your question best.
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Vic384
4 Tellurium

Re: XPS 8700, Samsung 950 Pro, low performance

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Based upon the posted image from Samsung Magician it appears to be an older version of the program. The version (6.0.0) I have does not look like that. 

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XPS007
1 Copper

Re: XPS 8700, Samsung 950 Pro, low performance

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Lol.. you're right, that's why I opened this query, those benchmark numbers are crazy

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Tesla1856
6 Thallium

Re: XPS 8700, Samsung 950 Pro, low performance

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@XPS007 wrote:

Lol.. you're right, that's why I opened this query, those benchmark numbers are crazy


Well, I think we all appreciate your confidence in us, but we are not Samsung support. I don't even have Samsung Magician installed anywhere. Your version of Samsung-Magician seems to be having trouble analyzing your (rather old) hardware.

Two of now have mentioned Crystal Disk-Mark . As for the other things, I just use Crystal Disk-Info or Windows.

 


Registered Microsoft Partner and Apple Developer
- Like many of you, I can appreciate a good game-engine.
- I answer questions here, but I'm not a Dell employee.
- Consider giving posts you like a "thumbs-up"
- Posting models-numbers and software versions speeds trouble-shooting.
- Click "Accept as Solution" button on any post that answers your question best.
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XPS007
1 Copper

Re: XPS 8700, Samsung 950 Pro, low performance

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Yes, now I have tried to do a test with Crystal Disk-Mark and there seems to be more congruence although I honestly do not know the proper way to interpret these numbersUntitled.jpg

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