Dell XPS 9350/9550 owners - poor writing performance with PM951 SSD?

I'm not sure but I believe both Dell XPS Skylake models have all same Samsung PM951 SSDs.
I just hope we don't have the same problem as those guys with MS Surface Book.
Can you guys post some SSD scores from "AS SSD Benchmark" or "Crystal DiskMark"?

This can't be real or is it?
http://answers.microsoft.com/en-us/...k/4267a139-0603-4a91-9cec-97982d71d511?auth=1

Posted on page 2 by imbrahimkhanjadoon:
....But, actually, there are some serious issues going on with the SSDs and it looks like hardware. The short version is that all of you have Samsung SSDs, the TLC-based PM951 drive. It's a really weak drive in terms of writes, especially the 128GB model. A spinning hard disk writes faster than the PM951 128GB--it's not software. Samsung rates it at only 150MB/s sequential writes......

 

I have the same issue... I only get 300mb/s on my 950pro evo

Edit.

http://imgur.com/Jpw33Yr Happy days.

 

What do we think about this

http://imgur.com/Jpw33Yr

 

Except 4KQ32T Read speed, it's pretty much the same with reviews:
http://arstechnica.com/gadgets/2015...rst-pcie-m-2-nvme-ssd-is-an-absolute-monster/

 

It's real, XPS 15 uses PM951. If you need better write speed, select the 512GB SSD model.

 

I have the 512 SSD (MS Sig XPS 15 9550 i7/16/512/4K). Results don't look good:

Sequential Read (Q= 32,T= 1) : 828.576 MB/s
Sequential Write (Q= 32,T= 1) : 591.729 MB/s
Random Read 4KiB (Q= 32,T= 1) : 297.759 MB/s [ 72695.1 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 249.160 MB/s [ 60830.1 IOPS]
Sequential Read (T= 1) : 718.325 MB/s
Sequential Write (T= 1) : 591.206 MB/s
Random Read 4KiB (Q= 1,T= 1) : 37.804 MB/s [ 9229.5 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 110.397 MB/s [ 26952.4 IOPS]

Test : 4096 MiB [C: 10.3% (49.2/475.5 GiB)] (x5) [Interval=5 sec]
Date : 2015/11/05 11:53:47
OS : Windows 10 [10.0 Build 10576] (x64)

 

600MB/s is normal write speed for PM951 512GB SSD. You can look for the PM951 information on Samsung website.

 

Hi guys,

It took me 4 hours but I made, you have to start your computer in AHCI not in RAID Mode in the bios (no driver needed, just restart in safe mode W10 - activate AHCI in bios - Boot on W10 and disable safe mode).
You have to install latest Samsung NVMe driver and restart. Driver is available here http://www.samsung.com/semiconducto.../software/Samsung_NVMExpress_Driver_rev11.zip

Reboot and you'll have this AS SSD benchmark result, not the best result but really better than earlier... My result in Write/4k was less than 1MB/s, more than 100 times faster.



Envoy !

Robin

 

Thats why I switched to the M2 Samsung 850 EVO although not faster in terms of read speeds than the PM951 it is very balanced with higher write speeds, the PM951 to me is just a cheap knockoff of the 850 EVO and 950 PRO. Your better off getting the XPS 15 with the 1tb M2 Toshiba SSD.

 

AS SSD is bugged, it gives low write speeds. As you can see crystal disk mark works as it should.

 

256GB, Intel RST

 

Use crystal disk mark as I have already said

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