Question ASUS prime b350 plus m.2 working on x2 instead of x4

Jan 18, 2020
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I have ASUS prime b350 plus
Still cant get my M.2 adata xs8200 to work over 1700mbs read or write becuse my m.2 is working only x2 instead of x4 witch is half
And it should be workin becuse i am using ryzen 5 3600


AMD Ryzen™ Processors :
1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)*4
My sata 1 and 2 are poulated in raid 0
Have a rx 580 in 16x slot
and that m.2 that is all

Tried to set up manual x4 in bios bios but it didnt help.
its still working x2. Any sugestions?
View: https://imgur.com/a/pzrkKjz
 

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Aug 12, 2007
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It looks like you covered all the bases, although I'll ask that you make sure the SATA drives aren't in SATA ports SATA_5 and/or SATA_6 which share bandwidth with the M.2 socket. These would be the two SATA ports separate from the other four (topmost). Although I suspect you already know this.

The M.2 socket on this board uses direct CPU lanes so it's otherwise unfettered for x4 use, assuming it's set in BIOS (which you said you did). This means it's more likely a BIOS issue related to the Zen 2 CPU in my opinion.
 
Jan 18, 2020
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The bios is the newest and I know about the sata 5 and 6 limitation. So I use number 1 and 2. I will try to pull my vga and use onboard graphic just to see if there is any diference
 

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