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How to Enable DMA in Windows 7 Home Premium

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.