New SSD upgrade reaching only 35-50% of promised speed in hp 15q-ds0010tu

[sataPCI]

Hi All,

I am using hp 15q-ds0010tu.  i upgraded below SSD

Crucial P3 Plus 500GB PCIe 4.0 3D NAND NVMe M.2 SSD, up to 4700MB/s - CT500P3PSSD8

link

New SSD upgrade reaching only 35 % of promised speed (4700 Mb/s) . below is test results

1. Is my laptop motherboard offers PCIe  gen3 or gen4 ?

2.New SSD upgrade reaching only 35-50% of promised speed

How to improve this SSD speed ? (to upto 4700MB/s if laptop supports gen 4 and to upto 3500 MB/s if laptop supports gen 3 )?

Thanks !

Laptop layout before installation 

[Paul_Tikkanen · Accepted solution]

Hi:

You have a couple of problems...

1. Your notebook's NVMe slot is only PCIe Gen 3.0, so a Gen 4.0 SSD will not run at its maximum advertised read/write speeds.

2. The thing that is really hampering the performance is something forum members have reported for several years now.

The M.2 slot is only using two PCIe lanes, so the drive is only running at approximately 1/2 of its advertised read/write speeds.

Let's use a PCIe Gen 3.0 SSD to measure the difference...

This one has a maximum read speed of 3500 MBPS and a maximum write speed of 3000 MBPS.

Amazon.com: SAMSUNG 980 SSD 1TB PCle 3.0x4, NVMe M.2 2280, Internal Solid State Drive, Storage for P...

If someone were to install that drive in your PC, it would have a maximum read speed of approximately 1750 MBPS and a maximum write speed of approximately 1500 MBPS.

So, the top line Crystaldiskmark report speeds are just about exactly where they should be given the above information.

That' still about 3x faster than any SATA SSD can provide.

[sataPCI]

Hi @Paul_Tikkanen, 

Thanks for the update !

1.  Got it. 
2. "The M.2 slot is only using two PCIe lanes, so the drive is only running at approximately 1/2 of its advertised read/write speeds."

=> Another question : is it possible to increase PCI lanes to 4  in my PC thus increasing speed ? Is PCI lanes are SW or HW element ?

[Paul_Tikkanen]

You're very welcome.

Unfortunately, there is nothing you can do to fix the problem.

It is a hardware issue.

I believe that problem was eliminated in the 15q-ds1xxx/15-da1xxx model series.

[sataPCI]

Paul_Tikkanen : OK. I got it. I got the clarity !
Thanks for the update !

[Paul_Tikkanen]

Anytime. 

Glad to have been of assistance.