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How to Enable DMA in Windows 7 Home Premium

Wednesday, November 9th, 2011 by | Filed Under: Computer Terms, Hardware & Peripherals

Duke in St. Louis asks:

How do I turn the DMA back on in Windows 7 Home Premium?

Hello Duke, thanks for the great question. You will be glad to know that it is easy to turn the DMA back on in Windows 7 Home Premium.

Before we get started, make sure you are logged on as an administrator or you will not be able to perform the following steps.

What is DMA?

DMA, also known as Direct Memory Access, allows peripheral devices in computers to send data to the memory on the motherboard without any type of intervention from the CPU.

The DMA controllers are embedded into the chip in modern processors, and manage data transfers. DMA is used to help speed up a computer and allow you to multitask. When you enable DMA, it allows you to read/write data in the external memory, internal memory, and peripherals, without any involvement from the CPU, which leaves the processor open to do other tasks.

DMA is normally turned on by default for your hard disk, and DVD or CD drives, if they support DMA. If a device is improperly installed or you have a system error, you may need to turn DMA on manually.

Enable DMA

Click the Start button in the lower left corner, click Control Panel, click System and Security, and then click Device Manager link in the System section. The Device Manager window opens. You may be prompted to enter your administrator password.

Click next to IDE ATA/ATAPI controllers in the left pain to collapse it. The menu will expand and you will see other options.

Find each icon that has the word Channel as part of the label in the list. Right-click each icon with the word Channel, and select Properties.

Click the Advanced Settings tab, and select the Enable DMA check box to check it. Click OK to save the changes.

DMA should now be enabled on your Windows 7 Home Premium computer. We hope this tip has been helpful for you.


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5 Responses to “How to Enable DMA in Windows 7 Home Premium”

  1. Deb Olson says:

    Good tip except my IDE had:
    ATA channel 1 DMA enabled
    ATA-Channel 4 DMA enabled
    ATA-Channel 5 Device working properly
    INTEL R- Device working properly

    I know my DMA is enabled but do not know what the heck
    all the other means!!

  2. dennis rossow says:

    your idea was good help for most people but me. im running windows7 home premium and when i clicked on the IDE ATA/ ATAPI CONTROLLERS the only thing that dropped down to be clicked on next was intel (R) 5 series 6 port sata ahci controller and nothing else. your helpful article didnt help me out at all. but thanks for your help. Dennis

  3. james says:

    hi dennis, i saw the same thing as u did. So, is there any other solution?
    Please help Duke in St. Louis Thanks.

  4. max says:

    Sorry to resurrect this thread. I am in a similar situation. Can anyone tell what to do if only the processor is listed?

  5. alex canales says:

    procedure for enabling/disabling windows 7 DMA explained very thorough and very well Thank You very much

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