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

Mar 10, 2021
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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
 

Karadjgne

Titan
Ambassador
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 The chipset might have outdated drivers or bios quirks that are part of a newer revision fix.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

Respectable
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.
 

Karadjgne

Titan
Ambassador
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 The chipset might have outdated drivers or bios quirks that are part of a newer revision fix.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.
 

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