AMD Motherboards - PCIe 3.0 x4

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PCIe 3.0 x4

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=12144
Printed Date: 29 Jul 2025 at 5:32pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: PCIe 3.0 x4

Posted By: thisisawar
Subject: PCIe 3.0 x4
Date Posted: 08 Aug 2019 at 10:50pm

Hi, I've searched this forum and can't find an answer that is applicable to my situation and I've been troubleshooting this for over a day.

I have the ASRock Fatal1ty X470 Gaming K4 AM4.
I have a AMD Ryzen 5 2600X processor and I just got the Samsung 970 Evo 500 GB NVMe SSD. I have it in the M2_1 port on the motherboard.
I also have a Nvidia RTX 2070 in the PCIE1 slot.
I'm getting half the speeds I should be getting with the SSD and Crystal Disk info tells me it's running at PCIe 3.0 X2 with supported PCIe 3.0 X4. I've went through bios and could not find any way to change anything with NVMe other than putting it into raid mode which I'm not looking to do. I've installed Samsung's NVMe drivers as well as the most recent chipset drivers for the x470 and none of this has improved it. Can anyone tell me what I'm doing wrong? Thank you