Question brand new Samsung 970 EVO Plus 500GB gets half speed performance! Please help

[SumTingW0ng]

brand new drive just got today
Sequential read: 1781 MB/s

Sequential write: 1770 MB/s

Somehow Crystaldisk info report my drive using pcie 3 x2, not x4????? I have ASUS ROG Strix X470-F motherboard. I install the 970 evo plus underneath the cpu nvme slot 1. I also have 4 sata drives(2 hdd + 2 ssd) + 1 dvd/cd player. Samsung magician said my drive is up-to-date firmware.

 

[Lafong]

Not familiar with the board, but the spec sheet says:

M.2_2 socket shares PCIe clock with PCIeX1_1. When PCIeX1_1 or PCIeX1_3 are occupied, M.2_2 only can support SATA mode.

 

[SumTingW0ng]

Not familiar with the board, but the spec sheet says:

M.2_2 socket shares PCIe clock with PCIeX1_1. When PCIeX1_1 or PCIeX1_3 are occupied, M.2_2 only can support SATA mode.

The manual said m2 slot 1 underneath cpu is pcie 3 x4. I have my 970 evo plus in m2 slot 1 underneath cpu. Cpu is ryzen 7 3700x.

 

[Lafong]

Is there only 1 m2 slot?

Can you re-arrange whatever is in the other slots?

 

[SumTingW0ng]

Is there only 1 m2 slot?

Can you re-arrange whatever is in the other slots?

https://imgur.com/a/f2eDJuK

View: https://imgur.com/a/f2eDJuK


There are 2 m2 slot. the one near the chipset can run pcie 3 x4 but it will disable some of my sata port.
the one underneath the cpu can run pcie 3 x4 without sata ports disable and it is where my 970 plus evo install at.