Intel Motherboards - B150M Pro4V cannot set both USB 3.0 and 2.0

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B150M Pro4V cannot set both USB 3.0 and 2.0

Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=15993
Printed Date: 02 Aug 2025 at 12:57pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: B150M Pro4V cannot set both USB 3.0 and 2.0

Posted By: j2ee
Subject: B150M Pro4V cannot set both USB 3.0 and 2.0
Date Posted: 11 Sep 2020 at 1:09pm

My motherboard is Asrock B150M Pro4V and case is CoolMaster N400. The front panel two usb 3.0 ports and two 2.0 ports "work" for years so I didn't find out the problem. Recently I bought an external SSD then I found out the USB 3.0 in front panel of the case actually just works as USB 2.0 with around 40mb/s. If I unplug then usb 2.0 cable from front panel to motherboard, then the two usb 3.0 port speed become 3.0 speed with over 100mb/s, but the two 2.0 ports do not work at all no response.

I check the bios and no setting related to this. Any idea? Thx!