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32 Posts

05-06-2014

CH

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P50: PCIe-NVMe SSD or normal SSD?

2016-05-02, 22:19 PM

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!

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2361 Posts

04-20-2008

US

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

2016-05-02, 23:34 PM

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.


P53 XEON 2276 BIOS 1.23 OLED UHD 4K Multi-touch display, 96GB RAM, RTX5000, RAID 1, 1TB x 2 Samsung PM981, 1TB PM981, WWAN
P70 XEON 1505, BIOS 2.35, 4k Display, 64GB, M3000M NVIDIA GPU, RAID1 1TB Samsung PM981 PCIe-NVMe SSD x 2, 2x Samsung 850 Pro 1TB SSD. EM7455 WWAN
P1. BIOS 1.25,Xeon Processor, 4k UHD IPS multi-touch display, 32GB, PM981 1TB x 2, RAID1

I am not an employee nor an agent of Lenovo.
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67 Posts

03-05-2016

SE

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

2016-05-03, 4:18 AM

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

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551 Posts

10-03-2011

CA

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

2016-05-03, 12:11 PM

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.

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2361 Posts

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

2016-05-03, 12:57 PM

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


P53 XEON 2276 BIOS 1.23 OLED UHD 4K Multi-touch display, 96GB RAM, RTX5000, RAID 1, 1TB x 2 Samsung PM981, 1TB PM981, WWAN
P70 XEON 1505, BIOS 2.35, 4k Display, 64GB, M3000M NVIDIA GPU, RAID1 1TB Samsung PM981 PCIe-NVMe SSD x 2, 2x Samsung 850 Pro 1TB SSD. EM7455 WWAN
P1. BIOS 1.25,Xeon Processor, 4k UHD IPS multi-touch display, 32GB, PM981 1TB x 2, RAID1

I am not an employee nor an agent of Lenovo.
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67 Posts

03-05-2016

SE

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

2016-05-03, 13:43 PM
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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