Question new Samsung Evo 970 Plus write speed decreased to 800MB/s

[soudij]

Hello, I'm facing this issue just bought a brand new 970 Evo Plus 500gb 3 days ago and it had perfect readings with above 3000mb both read and write, now I've noticed a difference in a specific operation I do and I found out that it's write speed is decreased to avg. 800MB!

Issue shown in this video

And also in the Samsung magician drive it shows this but when it was doing that benchmark in the taskmanager the write speed was only 800MB IDK why it's showing around 2000MB

It's max temp ever was around 65c I guess never reached higher
In the motherboard manual it says this:

I have it connected in the M2_1 but the CPU generation isn't mentioned but i guess it shouldn't be a problem that I've a Vermeer CPU as it's not an APU so I really don't know where's the problem or it should be normal in my case!

Specs:
CPU Ryzen 5 5600x
GPU GTX 1050
MB ASROCK B550 Pro 4

 

[mdd1963]

See what default CrystalDiskMark shows for sequential reads/write speeds?

Does CrystalDiskInfo show PCI-e 3.0/4.0 x4 lanes in 'Transfer Mode' column? (Making sure you did not get stuck in some weird PCI-e 2.0x4 config!)

CHeck in your Device Manager/disk drives/970 EVO/policies that 'Enable Write Caching' is still enabled?

 

[soudij]

See what default CrystalDiskMark shows for sequential reads/write speeds?

Does CrystalDiskInfo show PCI-e 3.0/4.0 x4 lanes in 'Transfer Mode' column? (Making sure you did not get stuck in some weird PCI-e 2.0x4 config!)

All good I guess!