[SOLVED] READ speed 2400MB/s but WRITE < 500MB/s why?

[ravipabari]

My Laptop's Model => Dell 5577 Gaming
CPU = i7-7700HQ
GPU = GTX 1050m
Motherboard info (ss from HWiNFO64):
https://ibb.co/cgcVgr5
SSD Info :
https://ibb.co/zr4fNFj
Yesterday I bought WD's SN550 500GB SSD which has read speed upto 2400MB/s and write speed upto 1900MB/s. But the read speed is 2400MB/s but the write speed is very low!! I don't know what should I do...Should I order a replacement or my motherboard does not support high write speed. Very confused Idk laptop has support for PCIe gen3 or not :/
Result of read/write speed test( used CrystalDiskMark) :
https://ibb.co/Lr80K32

 

[jeremyj_83]

Having used CrystalDiskMark to test disk performance, I have found the results to be suspect. In Tomshardware review of that SSD, they used IOMETER for the synthetic testing. https://www.tomshardware.com/reviews/wd-blue-sn550-m2-nvme-ssd-review-best-dramless-ssd-yet/2 Overall I wouldn't put much weight in synthetic tests.

 

[Bob.B]

My Laptop's Model => Dell 5577 Gaming
CPU = i7-7700HQ
GPU = GTX 1050m
Motherboard info (ss from HWiNFO64):
https://ibb.co/cgcVgr5
SSD Info :
https://ibb.co/zr4fNFj
Yesterday I bought WD's SN550 500GB SSD which has read speed upto 2400MB/s and write speed upto 1900MB/s. But the read speed is 2400MB/s but the write speed is very low!! I don't know what should I do...Should I order a replacement or my motherboard does not support high write speed. Very confused Idk laptop has support for PCIe gen3 or not :/
Result of read/write speed test( used CrystalDiskMark) :
https://ibb.co/Lr80K32

Look in device manager for that disk and verify write caching is enabled.

 

[ravipabari]

Look in device manager for that disk and verify write caching is enabled.

Seems like it was enabled already.

 

[ravipabari]

Having used CrystalDiskMark to test disk performance, I have found the results to be suspect. In Tomshardware review of that SSD, they used IOMETER for the synthetic testing. https://www.tomshardware.com/reviews/wd-blue-sn550-m2-nvme-ssd-review-best-dramless-ssd-yet/2 Overall I wouldn't put much weight in synthetic tests.

So the CrystalDiskMark test results are not accurate in my case?

 

[Karadjgne]

Suspect would be a more accurate term. Testing is done on one motherboard, to preserve objectivity and parity in results. A different tester might use a different motherboard. A different cpu, different ram, different ports. The m.2 might be on cpu direct pcie lanes, or by a chipset. The chipset might have outdated drivers or bios quirks that are part of a newer revision fix. Drive performance can change simply due to amount of fill, some nvme loose a good chunk if over 50% full and all SSDs loose out when less than 10% is left.

Entirely possible you are getting what you get, but another reviewer got better simply due to a different setup.

 

[Bob.B]

Seems like it was enabled already.

Grab a copy of crystal disk info.
Post a screen shot of the results.