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Back Motherboard USB ports not working

So, I was playing on Black Ops 3 on my PC. At the time, and still now, my mouse and keyboard occasionally stopped connecting to my PC for a few seconds, then reconnect. They work on one wireless usb reciever in the back of my PC, however they sometimes both disconnect, and sometimes just one disconnects. I was playing BO3 and my PC just powered off, for no reason, then restarted. When I tried to Ctrl-Alt-Delete onto my PC, it didn't work. I tried the reciever in a different USB port in the back of my PC: again, nothing. I then tried the reciever in the front USBs of my case, and it worked. I checked if the back USBs were being powered by connecting my tablet to it and checking if it started charging: it didn't. Is this my Motherboard or my Power Supply?
By the way, I am using a Logitech K330 keyboard and a M215 mouse.
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  1. It sounds like your PC may not be getting enough power or your USB ports may be physically bad. It is normal for USB ports that are going bad to not recognize devices, but you said your PC just powers off. Have you had any power surges recently? Power outages? Anything like that?

    You have riser screws on the motherboard, yes?
  2. thejackal85 said:
    It sounds like your PC may not be getting enough power or your USB ports may be physically bad. It is normal for USB ports that are going bad to not recognize devices, but you said your PC just powers off. Have you had any power surges recently? Power outages? Anything like that?

    You have riser screws on the motherboard, yes?

    I don't think it is bad USB ports because they all stopped working at the same time. I presume I have riser screws as my PC was pre-built, however I have slowly upgraded it (I haven't upgraded the motherboard yet). My monitor kept on while the PC just turned off then restarted itself.
  3. Best answer
    Well, maybe you overloaded ports or something. As you said, the ports in the front work, and they connect via a wire to the board, so it's not the board that's the issue, it's the USB ports. Only way I can think of to get around this if they are still not working is to get yourself a hub or get a USB PCI card and hub off of that.
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