Question SSD - NVMe speed drop

[Mage123]

Hello,

I did little SSD and HDD comparison, in picture below you can see all speeds. (You need too zoom via browser function, imgur can't zoom close enough)

I don't know why but i can't add pictures via insert image function ZOOM IN AND ZOOM OUT FOR PICTURE QUALITY REFRESH

https://imgur.com/a/97Z6uJ2

View: https://imgur.com/a/97Z6uJ2


Why do Plextor NVMe loses all its writing speed?

And how 6 years old Toshiba can Perform better than Plextor? (In "will it work?" table)

 

[rgd1101]

how full it is, how hot it get?

 

[Mage123]

how full it is, how hot it get?

Here i added Temp, and free space: (I fixed times speed lose starts for PLEXTOR at of use 1 min - and from 2 mins its stable 70 MB/s) Other drives i tested more than 1 min and they are not losing speed.

https://imgur.com/a/PZKEmjh

View: https://imgur.com/a/PZKEmjh


However testing in CrystalMark and AS SDD shows normal results: (It's looks fine here)

https://imgur.com/a/r9ZrzIS

View: https://imgur.com/a/r9ZrzIS

I tested drives again and results are pretty much same ( so i didn't change them in picture), but this NVMe performs in long time run worse than normal SSD)

 

[rgd1101]

what you full system spec?
how are all these ssd connecting to the motherboard?

look like overheating

 

[Mage123]

what you full system spec?
how are all these ssd connecting to the motherboard?

look like overheating

Samsung T5 was tested via USB 3.1 since its external drive.
Other ones are connected directly to the motherboard.

It's Alienware laptop:
Alienware 15 R3 1.7.0 U3E1
6700HQ
GTX-1060 6G

https://imgur.com/a/9REX9xG

View: https://imgur.com/a/9REX9xG

In all other tests it's performs fine, but in long run starts to lose speed.
I really doubt that its overheat since 45 -65 isn't much. It can't be that NVMe performs worse that small SSD's.

Apparently issue might be in my "SATA Operation" - RAID ON (Intel Rapid Storage Technology) setting. For NVMe and this drive it's should be set to AHCI (According to Plextor Support).
If its not set to AHCI, official Plextool software isn't working.