https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 23 Apr 2026 03:57:35 +0000 Sat, 09 Nov 2019 03:28:42 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=12833 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=12833&PID=69789&title=x470-pcie-lane-issues-with-matisse#69789 Author: polpo
Subject: 12833
Posted: 09 Nov 2019 at 3:28am

Problem solved with the help of comment above.

Some notes what happened:
- I switched to 2x8 mode and booted with 2 pcie cards attached. It cleared bios settings for some reason and could not get image to screen.
- Switched again to 2x8 mode and set some of the other settings at the Advanced\AMD PBS\ to auto and it started working.

Thanks!    ]]> Sat, 09 Nov 2019 03:28:42 +0000 https://forum.asrock.com/forum_posts.asp?TID=12833&PID=69789&title=x470-pcie-lane-issues-with-matisse#69789 https://forum.asrock.com/forum_posts.asp?TID=12833&PID=69777&title=x470-pcie-lane-issues-with-matisse#69777 Author: Ray62
Subject: 12833
Posted: 08 Nov 2019 at 6:08pm

You have to switch the two PCIe slots in 2x8 mode in the bios, i think.
Should be under Advanved\AMD PBS\PCIe x16/2x8 Switch]]> Fri, 08 Nov 2019 18:08:27 +0000 https://forum.asrock.com/forum_posts.asp?TID=12833&PID=69777&title=x470-pcie-lane-issues-with-matisse#69777 https://forum.asrock.com/forum_posts.asp?TID=12833&PID=69776&title=x470-pcie-lane-issues-with-matisse#69776 Author: polpo
Subject: 12833
Posted: 08 Nov 2019 at 4:26pm

Hello. I am facing some problems with pcie lanes in my current Taichi ultimate x470 build.

Specs here:
- Taichi ultimate X470 (with BIOS P3.30)
- Ryzen 3900X 12-core 24-thread
- Nvidia MSI GeForce GT 1030 2GB LP (PCI-e 3.0 x16)
- Dell Perc H310 in IT-mode (PCI-e 2.0 x8)

I started my build with some earlier BIOS version and Ryzen 1700, and updated the BIOS to P3.30 by following the instructions. Then I upgraded the CPU to the Ryzen 3900x and the system was working.

The GPU was installed on the PCIE1 slot and it was working. Then I added H310 card to the PCIE3 slot and I couldn't get image to the screen from the GPU at PCIE1. I read about the pcie-lanes on this motherboard and I realized it has some auto feature which turns PCIE3 and PCIE1 to x8 mode if there is card in both of these slots.

But as far as I am aware the GPU should be working even if it's 8x lanes. I tested the GPU by putting it into the PCIE5 slot (which has x4 slots) and it worked without problems.

In the last test I set the GPU alone in the PCIE3 slot and got no image.
Could this be something related to the BIOS or faulty pci-e lane? Or am I just missing something?

Greetings Polpo]]> Fri, 08 Nov 2019 16:26:19 +0000 https://forum.asrock.com/forum_posts.asp?TID=12833&PID=69776&title=x470-pcie-lane-issues-with-matisse#69776