Windows 10: DMA Information is blank in System Information

I have a desktop pc with Win10 v1803 and noticed that under System Information/Hardware Resources/DMA there is nothing shown in the right pane.

On my laptop also running the same version of Windows 10 has the DMA information

:)

 

DMA Devices?


When I go to "System Information" and expand the "Hardware Resources" tab and then click "DMA" (Direct Memory Access), the panel that lists the devices is blank, i.e. no devices are shown.

Since my hdd, ssd, NIC, sound card etc. normally are supposed to use DMA, I'm not sure why I'm not seeing them listed.

I checked Device Manager but there doesn't appear to be any way to verify if DMA is being utilized. I recall in prior versions of Windows, Device Manager would display a check box in one of the tabs for a specific device, that would indicate if DMA was active, but I don't see this feature in Windows 10.

Is there any other way to verify whether or not devices on my computer are utilizing DMA?

Thanks.

Bob

 

DMA Devices?


The "DMA" in System Information likely refers to the legacy ISA DMA controller which had a limited number of channels that could be assigned to devices.

Every PCI (and PCIe) device can bus master and access system memory on its own. Therefore there's no separate controller or assignment of DMA resources needed.

 

DMA controller

Hi,



I realized your concern and will assist you to resolve the issue.



If you enable DMA for some reason if there is a problem with the hardware or drivers, DMA can malfunction and lead to hardware failure. So you may consider need to disable DMA.



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