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09-12-2018 02:25 PM - edited 09-12-2018 02:41 PM
I have installed the samsung 950 pro in to my Z820, and installed windows on it via the UEFI method. All it working, and its booting up stable.
However, the performance of the 950 pro is way off mark, Im getting 820 MB/s Read and 815 MB/s write.
I have noticed that even though I installed Samsungs nvme inf drivers (3.0 version) during windows 10 installation, windows is using its own drive (which is a 2016 driver).
I then tried to install the Samsung nvme drivers as its standard exe file after windows boot (with admin rights), and its still only going with the microsoft ones.
Im not sure if its these microsoft drivers that are causing the Samsung 950 Pro to run so slow.
Does anyone have any idea how I can force the drivers to update (all option like "update driver" is ghosted out)
Any help would be hugely grateful
09-12-2018 02:36 PM - edited 09-12-2018 02:42 PM
Just an update on this. I was checking the driver by right clicking on the c drive and selecting properties.
I have now checked via the device manager, and under "Disk Drives" there is "NVMe Samsung SSD 950 SCSI Device", this is the one which has the microsoft driver installed.
Then under "Storage Controllers" there is "Samsung NVMe Controller", this one does have the samsung driver installed.
So maybe the drivers are ok
But the performance is still very poor compared to posts I have seen
09-12-2018 04:29 PM
Your nvme drivers are fine, the samsung nvme driver is loaded. when it's loaded the "Samsung NVMe Controller" appears under storage controllers
do note that the samsung 950 is a unusual ssd in that it contains the needed nvme oproms in it's own firmware. it's this oprom code that allows a nvme drive to boot on a system that lacks the oprom code in the motherboards bios
how is the 950 installed (which adapter is used) and which slot is it in? the 950 is made to use a pcie 3.0 x4 inteface
which is no problem for the z820. Be advised that unless you have dual cpu's installed, two pci-e slots will be non functional
the recomended slot in a hp z820 for a SSD is the one just above the primary video card slot
and last which method/program did you use to test the ssd?
09-12-2018 04:43 PM - edited 09-12-2018 04:45 PM
Thanks for the reply
The Z820 Specs are
Dual E5-2690 v2
128 GB Memory (16x 8Gb modules)
Nvidia Quadro K5200 - Installed in slot 4
Nvidia Tesla K20 - installed in slot 2
Samung 950 Pro 512 GB NVMe, Installed on a StarTech M.2 adaptor (x4 PCIe 3.0 NVMe)
I have tried this installed in Slot 1 and Slot 6, and both are achieving the same speeds.
I used both Crystal Disk Mark and Samsmung Magician to run the test, both similar in results
No other drives are installed
09-12-2018 04:52 PM
Also....I ran the test in safe mode as well, and the same result
One thing I have noticed is that the Samsung Magician software seems to show a x1 under the interface (PCIe Gen. 3 x 1)
Does that mean its only using 1 lane?
Not sure how or why as its showing that in Slot 1 and 6 as well
09-12-2018 10:53 PM
you may be verry well using a x1 connection the SM951 (AHCI) that i have in my z820 is posting much faster R/W numbers
heres a article that covers/compares the xp941/am951/950 pro
is it possible to remove one or two pci-e cards and rerun the test?
is the bios current and set to default settings?
is the 950 firmware current?
09-13-2018 10:10 AM
Right, I have removed the Telsa K20 card, but left the K5200 graphics card in. There is no other HDD connect, and not other PCI devices installed. Ive even disconnect the CDrom for now.
Results where the same unfortunately
The Samsnung 950 Pro firmeware is the latest
The Z820 Bios is the latest as show in the below pictures.
So I decided to do a fresh install of windows 10, just to show the steps I went through, and have posted all the picture below, include all the Bios settings.
After all this, the results where the same
The other option I had to test is I have another Samsung 950 Pro card. So I changed out the 950 Pro on the Star Tech Card, and went through the same process again as well.
This time, when I ran the test, these results were better, but I think still not inline with what others see, The results are posted on the last images of the below picture collection. Also interesting was the second 950 pro Card showed x4 in the samsung magician software rather than the X1 for the other 950 pro card (This was installed in the same PCIe slot - slot 1)
Could this suggest there is a problem with the first 950 pro card? although the second card still isnt up to full speed I guess?
Different 950 pro
09-13-2018 08:48 PM - edited 09-13-2018 08:52 PM
it's possible that the gold pads on the 950 card were not mating with the startech carrier board.
if possible try another pci-e x4 m.2 card
the speeds posted in the last pictures you posted are inline with what my sm951 AGCI 256gb ssd gets
and one more question, why is AMT enabled? are you on a domain or does support need remote access to your system? if the answer is no disable AMT (you also might want to reset/clear the amt passwords back to default)
read up on amt before you do anything as there is no way to recover a unknown amt password