AMD Motherboards - Asrock B550m Pro4

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Asrock B550m Pro4 - Hyper M.2 slot

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=105912
Printed Date: 19 Jul 2025 at 1:47am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Asrock B550m Pro4 - Hyper M.2 slot

Posted By: OvRieL
Subject: Asrock B550m Pro4 - Hyper M.2 slot
Date Posted: 11 Apr 2025 at 11:22am

Hi All,

I've recently installed a WD Black SN7100 on this motherboard and for some reason, it's only showing on the WD Dashboard Tool that it's only connected to a Gen 3 x4 PCIe slot, even if it's a PCIe 4.0 SSD. I'm only getting read speeds of up to 1300mbps and read speeds of up to 2300mbps.

Why is this the case when the MoBo says it should support PCIe Gen 4? Any help would be appreciated.

Replies:

Posted By: OvRieL
Date Posted: 13 Apr 2025 at 2:18pm

Hi ScottG,it's installed on the hyper m2 slot

Posted By: eccential
Date Posted: 14 Apr 2025 at 11:01pm

What CPU are you using? If it's any of the APUs (e.g. 4700G, 5700G) or APU derived CPUs (e.g. 5500, 5700), then Gen.3 makes sense, because these APUs never supported PCIe Gen.4.

Posted By: OvRieL
Date Posted: 15 Apr 2025 at 4:02pm

Hi, it's ryzen 5 5600x

Posted By: eccential
Date Posted: 15 Apr 2025 at 9:26pm

5600X is Vermeer, so Gen.4 should work.
Maybe BIOS is configured to do Gen.3?
No idea.