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Thread: High Current USB Port?




  1. #1
    Virus39 is offline Junior Member
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    Question High Current USB Port?

    I just bought an ASRock Z77 OC Formula and its great. However, I can not seem to find a "charging" high current usb port. My other motherboard had one and it worked great for my tablet. Does anyone have one of these boards or know if it has a port like this? Thanks in advance

  2. #2
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    Default Re: High Current USB Port?

    Have you looked into the ASRock util "App Charger" that is an available download for your MB?

    ASRock > App Charger
    #1 - Please, when seeking help, enter the make and model of ALL parts that your system is comprised of in your Signature, or at least the model #'s in your System Specs, then "Save' it.
    ____If you are overclocking, underclocking, or undervolting any parts, informing us of this and their values would prove beneficial in helping you.

    #2 - G.Skill RAM Configurator for your boardSamsung Memory for your boardLatest AMD Chipset Drivers/WindowsLatest AMD Graphics Drivers/WindowsLatest Intel Drivers

    #3 - Please use the eXtreme Outer Vision Power Supply Calculator found HERE to determine if it might be your PSU at issue.
    ____Consider your PSU to be the foundation from which all else is built upon. Anything built upon a weak foundation is poorly built.

  3. #3
    Virus39 is offline Junior Member
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    Default Re: High Current USB Port?

    Yes I did download the driver. However it doesn't seem to do anything for my HP Touchpad. I am wondering if it is Apple Only or something like that. That's why I was wondering if there was a specific port I needed to plug it into, but none of the ports seem to make a difference.

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    Default Re: High Current USB Port?

    Here are a couple of caveats I'll mention in passing in case you aren't aware of them.

    ASRock > App Charger
    Code:
     * The charging capability may vary with different power supply design. The more +5V standby current provided, the better charge efficiency you get.
    ** Please connect the devices to the PC USB ports before the PC enters S1/S3/S4/S5 mode to enable a fast charge.
    *** To support APP Charger under S5 (Shut Down),
    A. If you could find "Deep S5" in BIOS SETUP, please set the option to [Disable].
    B. If you could not find the Deep S5 option, please set BIOS > Advanced > ACPI Settings > "PCI Devices Power On" as [Enabled].
    The below page indicates that on an older N68 board the ports were passing 1.5A to charge with.

    ASRock proves that their ASRock App Charger fast charge the iPad with the correct amperage
    #1 - Please, when seeking help, enter the make and model of ALL parts that your system is comprised of in your Signature, or at least the model #'s in your System Specs, then "Save' it.
    ____If you are overclocking, underclocking, or undervolting any parts, informing us of this and their values would prove beneficial in helping you.

    #2 - G.Skill RAM Configurator for your boardSamsung Memory for your boardLatest AMD Chipset Drivers/WindowsLatest AMD Graphics Drivers/WindowsLatest Intel Drivers

    #3 - Please use the eXtreme Outer Vision Power Supply Calculator found HERE to determine if it might be your PSU at issue.
    ____Consider your PSU to be the foundation from which all else is built upon. Anything built upon a weak foundation is poorly built.

  5. #5
    Virus39 is offline Junior Member
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    Default Re: High Current USB Port?

    Thank you for all the information Wardog I will give the UEFI another look and try plugging the tablet in before going into sleep mode. I hadn't thought to try charging it in sleep mode.

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    Virus39 is offline Junior Member
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    Default Re: High Current USB Port?

    Hmmm..... Unfortunately the only thing the tablet is doing is staying at 80%. It stays at this constantly. My other HP Touchpad does the same thing. Maybe it's not compatible with these devices? They do require quite a bit of power. 2A if I recall correctly. Any ideas?

  7. #7
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    parsec is offline Senior Member
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    Default Re: High Current USB Port?

    Your other board may have had what are called Powered USB ports. They usually have a red plastic piece inside the port for identification. They are not part of the official USB standard, so are unusual and not used often. These ports can be of different voltages, but for a 5V standard USB port, the Powered USB variant can supply up to six amps or 30W. I have an older ASUS board that has ports like these, but I doubt they can actually provide six amps, and certainly cannot do that when the PC is shutdown or in Sleep/Hibernate.

    As wardog posted, standard USB 3.0 can provide 1.5A/7.5W max when the boards charging software is installed. The 1.5A level is an additional USB standard, beyond the basic 0.9A of USB 3.0, and uses software control to negotiate the power sent to the device being charged.

    While plugging the device to be charged in before the PC Sleeps may enable the 1.5A charging rate, you did not understand the other restriction that happens when a PC sleeps. The PS uses its 5V Standby rail only when the PC is in Sleep mode, and the max 5V Standby current for 95% of PS's is 3A or less. The mother board and RAM is also using some of that power, so you never could get a 3A charge. Your board, with the software installed, will provide 1.5A max on the USB 3.0 ports.

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    Virus39 is offline Junior Member
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    Default Re: High Current USB Port?

    Thank your for the clarification parsec. My old motherboard was an ASUS with a red USB port. I think I've done all I can to get these tablets to charge. I guess I'll just buy a new wall charger. Thanks for all you help wardog and parsec.

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