B450 ITX
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=113411
Printed Date: 01 Feb 2026 at 4:02pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: B450 ITX
Posted By: corsair17
Subject: B450 ITX
Date Posted: 15 Dec 2025 at 5:24am
| I have a 9070 XT installed on my Asrock B450 ITX motherboard. The AMD driver software is reporting that the PCI-E bus is running at PCI-E 3.0 x8 despite the motherboard supporting PCI-E 3.0 x16 mode. I heard from other brands that installing a M.2 drive will reduce the GPU PCI-E slot speed from x16 to x8, but I'm not sure whether this applies to the Asrock B450 ITX specifically because I can't find any mention of this in the motherboard manual. I do have a M.2 SSD installed. |
Replies:
Posted By: corsair17
Date Posted: 15 Dec 2025 at 5:37am
| And if it matters, I have a 5700X3D CPU installed. The motherboard BIOS is flashed to the latest version (10.43 Beta). |
Posted By: corsair17
Date Posted: 17 Dec 2025 at 9:01am
| I re-seated by PCI-E riser cable and it's reporting x16 now. Problem fixed. |
Posted By: Xaltar
Date Posted: 17 Dec 2025 at 5:47pm
|
Thanks for the update corsair17. I was looking into possible causes for you but got distracted by holiday prep and forgot about your post, sorry. Step 1 in any situation like this is always reseat everything relevant to the issue  Glad you got it sorted out. ------------- 
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