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

SumTingW0ng

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Aug 6, 2017
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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.
 

SumTingW0ng

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Aug 6, 2017
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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.
 

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