AMD Motherboards - No boot with both x16 slots populated

Print Page | Close Window

No boot with both x16 slots populated

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=34372
Printed Date: 10 Feb 2025 at 2:08pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: No boot with both x16 slots populated

Posted By: trggrhppylmbx
Subject: No boot with both x16 slots populated
Date Posted: 04 Apr 2024 at 11:20am

On my x570 Steel Legend with a Ryzen 5950 CPU I have a problem booting with both an MSI 4080 Super and a Mellanox ConnectX-3 in the x16 slots.

With only the MSI card the system boots just fine. When I plug the ConnectX-3 into the other x16 slot the system stops with the VGA LED on. I tried setting the PCIe lanes to 1x8, 2x4, without success. When I pull the Mellanox card the system boots normally. The Mellanox card works by itself with an older graphics card (GTX-980).

Is this a BIOS issue or is there a fundamental problem with the RTX and an x4 card?

Thanks!

Replies:

Posted By: trggrhppylmbx
Date Posted: 04 Apr 2024 at 11:21am

Forgot to add, the RTX of course is Gen 4, the Mellanox is Gen 3 PCIe

Posted By: trggrhppylmbx
Date Posted: 06 Apr 2024 at 9:29am

It works with the Mellanox in an x1 slot. Not ideal, but at least a temporary solution. I'd still appreciate any insight.

Posted By: M440
Date Posted: 06 Apr 2024 at 7:09pm

when you run the 980 + lan card, which pcie version were those running?

do you have a pcie version setting for the slots in the bios?

-------------
asrock b650m/hdv.m2, ryzen 7700x@85watt