[SOLVED] Asrock x370 taichi PCIe x8 instead of x16

Fuad

Distinguished
Jun 20, 2009
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Hello,

  • CPU Ryzen 5900x
  • MB Asrock x370 taichi (bios 7.10)
  • Ram 16 (8+8) GB GSkill
  • Nvidia super 2060 RTX
  • Sound Card Creative Sound Blaster Z (disabled onboard sound)
  • Nvme WD wds100t2b0c
  • 5 HDDs

I had Ryzen 1700 with taichi x370 (bios 4.60) with no issues, got Ryzen 5900x and flashed MB bios using Ryzen 1700 from V 4.60 to V 5.1 to V 7.00 to V 7.10
Removed CMOS battery and reset, installed new processor Ryzen 5900x, booted to bios, Reset to defaults, reboot, entered bios again, everything is in order.
Formatted and installed Win 10 Pro, then AMD chipset latest chipset drivers, then latest other drivers.
PC was performing normal until I found this in CPUZ (I tried many times to insert the image with no luck so I put down the link to it):

View: https://imgur.com/a/mWBqOH9



It clearly states that current PCIe link width is x8 instead of x16
I checked the bios and it states x16, and set everything related from -Auto- to x16
Rechecked CPUz and the result is the same x8

Is this issue MB bios related or is OS related? will reinstalling windows help? please advice.

Kind Regards
 
Solution
D
Might give this a read, maybe remove the card reseat. Or make sure your NVME slots don't steal PCI-E lanes from the top slot.

I'm running out of ideas lol

If you are using the top slot is should be x16 click the question mark next to the x8 1.1 and run the render test and see if it changes.
 
Might give this a read, maybe remove the card reseat. Or make sure your NVME slots don't steal PCI-E lanes from the top slot.

I'm running out of ideas lol

 
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Solution
The bios settings is correct. We have tried all the higher level stuff, Time to try just reseating the card and looking into if the NVME drives take from the pci-e x16 lanes (I don't think this is the case) I don't think software is the issue drivers etc.