Weird USB dropout

PC Hardware & Gaming PC Builds, Modding & Overclocking
1

Hello, I’ve been experiencing a weird problem with my computer recently. My motherboard has 6 USB ports, but if I use more than 3 at any time (2 are always used for kbm peripherals) one or both of the non-kbm items will stop responding.
This has happened with

  • Wifi Dongle

  • External HDD

  • Android MTP

  • Bluetooth and Wired Controller

I tried disabling USB sleep timeout in the OS and couldn’t find anything that might be doing this in the BIOS but nothing really changed. At this point I sometimes just remove the keyboard to “make room” for the extra item. This is also not restricted to certain ports.
Is this normal?

My system is asus prime b350m-a mobo, amd r5 2600 cpu, gskill 16 gb single channel RAM, and a good gold 80+ PSU from Corsair.

2

Yes it’s normal. Not enough power on the usb power lanes. Check how much power and amps your psu can output on +5v lines. You can use an external powered usb dock instead of buying a new psu.

1 Like
3

Looking around it appears to be a problem with [AM4 boards and certain CPU configurations](’

https://old.reddit.com/r/Amd/comments/13c1hip/my_own_personal_fix_for_am4_usb_issues/’

)?
Has anyone else running AM4 experienced this?

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4

Don’t think its normal for a devices you plugged in.

You have 2 USB 3.1 and 4 USB 3.0 ports in the back.
10Gbps for 3.1 and 5gbps for the 3.0. None of the devices you mentioned can saturate that. I would recommend to connect the keyboard and mouse to USB 3.0 as they do not need 10gbps speed.

Check if you have this USB power delivery setting to enable it as well.

  1. Enter BIOS by pressing Delete or F2 during startup

  2. Navigate to Advanced Mode

  3. Go to Advanced > Onboard Devices Configuration

  4. Find the option “USB Power Delivery in Soft Off State (S5)”

  5. Set it to Enabled to allow USB charging when the system is powered off

I would recommend to update the BIOS, update the latest drivers for AMD chipset and update the windows drivers.

Seems this motherboard is designed to handle 14 USB devices directly connected to it. It should not show these issues on just 4 devices.

1 Like
5

Unlikely that this is a power delivery issue, since each port only does a maximum of 5W. But are these USBs sharing a single PCIe lane? Maybe that lane is bottlenecked by some device causing windows to shut down other devices for lack of bandwidth.

Try Ubuntu from a bootable without installing it and test functionality there. Might point to a hardware or software blockage…

6

I will try this and let you know how it went. Thanks. Just found out Asus released a new AGESA update for the board too.