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thinkuser-2006
Serial Port
Posts: 18
Registered: ‎05-06-2014
Location: CH
Views: 2,604
Message 1 of 6

P50: PCIe-NVMe SSD or normal SSD?

Hi,

 

PCIe-NVMe SSD or normal SSD?

 

Which kind of SSD would you recommend?

 

A shop told me, that there are some problems with PCIe-NVMe regarding compatibility and
durability and that PCIe-NVMe is not really faster than normal SSDs.

 

Is this true`?


Thanks for any advice!

Guru
Posts: 1,794
Registered: ‎04-20-2008
Location: US
Views: 2,581
Message 2 of 6

Re: P50: PCIe-NVMe SSD or normal SSD?

The 2.5" SSDs are using the SATAIII interface and are restricted in R/W performance by the limitations of that connection. PCIe bus architecture is much faster than SATAIII (PCI Express 3.0 effectively delivers 985 MB/s per lane). The current interface is 4 lanes or 3940 mb/s or about 6.5 time faster than the SATAIII interface (600 mb/s). The SSDs using the PCIe bus are optimized to efficiently use the interface for maximum performance. The latest Samsung SM961 SSD (PCIe-NVMe) is showing 3200 mb/s sequential read. Compare that with the Samsung 850 Pro at 550 mb/s sequential read on SATAIII.


P70 XEON 1505, BIOS 2.30, UHD 4k Display, 64GB non-ECC RAM, M3000M NVIDIA GPU, RAID 1 512GB Samsung 951 PCIe-NVMe SSD x 2, 2x Samsung 850 Pro 1TB SSD. EM7455 WWAN
P1. BIOS 1.22,Xeon Processor, 32GB, PM981 1TB x 2, RAID 1
T470s, 16GB RAM, BIOS 1.10, i7-7500, WQHD display, 512GB PM961 PCIe NVMe SSD
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Thomas-
Punch Card
Posts: 56
Registered: ‎03-05-2016
Location: SE
Views: 2,533
Message 3 of 6

Re: P50: PCIe-NVMe SSD or normal SSD?

I got my P50 yesterday and I ran Crystaldiskmark on it before and after swapping out the SSD it came with for a Samsung 950 Pro 512Gb.

 

Before changing the SSD r/w 550 / 302

After changing the SSD r/w 2573 / 1529

 

Brgds...   /Thomas

p600
Broadband 3G
Posts: 484
Registered: ‎10-03-2011
Location: CA
Views: 2,494
Message 4 of 6

Re: P50: PCIe-NVMe SSD or normal SSD?


@thinkuser-2006 wrote:

A shop told me, that there are some problems with PCIe-NVMe regarding compatibility and
durability and that PCIe-NVMe is not really faster than normal SSDs.

Depends on meaning of "really faster".  In benchmarks numbers, NVMe drives are undeniably and significantly faster than SATA III for sequential I/O (they are not so much, or at all, faster for random writes).

 

In most real applications, outside of copying videos, ISOs and VM images from one disk to another, the bottleneck is typically in processing speed or network speed, and 500MB/sec bandwidth that modern SATA III SSDs can provide is more than enough for it not to be a limitation.

Guru
Posts: 1,794
Registered: ‎04-20-2008
Location: US
Views: 2,484
Message 5 of 6

Re: P50: PCIe-NVMe SSD or normal SSD?

So the P50 came with a SATA SSD in the M.2 position and it was not a 2.5" SSD?


P70 XEON 1505, BIOS 2.30, UHD 4k Display, 64GB non-ECC RAM, M3000M NVIDIA GPU, RAID 1 512GB Samsung 951 PCIe-NVMe SSD x 2, 2x Samsung 850 Pro 1TB SSD. EM7455 WWAN
P1. BIOS 1.22,Xeon Processor, 32GB, PM981 1TB x 2, RAID 1
T470s, 16GB RAM, BIOS 1.10, i7-7500, WQHD display, 512GB PM961 PCIe NVMe SSD
Thomas-
Punch Card
Posts: 56
Registered: ‎03-05-2016
Location: SE
Views: 2,473
Message 6 of 6

Re: P50: PCIe-NVMe SSD or normal SSD?

That's right... which is good because I wanted the M.2 tray needed for the Samsung 950 Pro.

As a side note I had already ordered the 2.5" storage kit which I used to hook up a Seagate 2.5" 2TB 7mm spinning drive :-)

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