Digital Research Technologies CMD PCI 646U2/648/649 Ultra DMA IDE Controller Driver Download

Download the latest version of the CMD PCI 646U2/648/649 Ultra DMA IDE Controller driver for your computer's operating system. This update - "" - has an average rating of 5 out of 5 stars based on 8 reviews, and has been downloaded 1,892 times. Compatibility for this driver update includes PCs running Windows operating systems such as Windows XP. The total disk space used for this update is 141.4 KB.

8 Ratings

Supported Models

CMD PCI-0640 IDE Controller

CMD PCI 646U2/648/649 Ultra DMA IDE Controller

CMD PCI-0643 DMA IDE Controller

CMD PCI-0643U Ultra DMA IDE Controller

CMD PCI-0646 DMA IDE Controller

CMD PCI-0646U Ultra DMA IDE Controller

CMD PCI-0646U2 Ultra DMA IDE Controller


Digital Research Technologies

CMD Technology

Supported Operating Systems

Windows 2003, Windows XP, Windows 2000, Windows NT4, Windows NT3.51, Windows ME, Windows 98SE, Windows 98, Windows 95, Windows 3.1

File Name

Additional Notes

The Ultra ATA/66 PCI Controller

after failing to install nt I went searching found out that my card had the cmd 648 chip found the driver located on the asus mb path

Work with NT 4.0 updates since 6/2000

Uploaded By

Brian Forsberg (DG Member) on 4-Dec-2003

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
Win9x/CMDIDE.DLL 23.2 KB 5 Nov 1999
Win9x/readme.win9x.txt 8.9 KB 18 May 2000
Win9x/setup.exe 41.0 KB 8 Jun 2000
Win9x/CMDIDE.VXD 9.9 KB 30 May 2000
Win9x/csa64xx.mpd 77.4 KB 26 May 2000
Win9x/cmddma.inf 4.3 KB 5 Jun 2000
Winnt/oemsetup.inf 3.7 KB 20 Jun 2000
Winnt/readme.txt 6.0 KB 23 Jun 2000
Winnt/cmdcfgNT.exe 58.4 KB 21 Apr 2000
Winnt/CSA64XX.SYS 55.4 KB 7 Jun 2000
DISK1 21 bytes 17 Oct 1997
txtsetup.oem 327 bytes 15 May 2000
Win2k/Readme.txt 6.8 KB 12 Nov 1999
Win2k/ 8.4 KB 25 Feb 2000
Win2k/CMDIDE.SYS 6.9 KB 22 Dec 1999
Win2k/cmdide.inf 2.6 KB 20 Dec 1999

How to Update CMD PCI 646U2/648/649 Ultra DMA IDE Controller Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the CMD PCI 646U2/648/649 Ultra DMA IDE Controller driver, click the green download button above. After you complete your download, move on to Step 2.

If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Digital Research Technologies CMD PCI 646U2/648/649 Ultra DMA IDE Controller into the search box above and then submit. In the results, choose the best match for your PC and operating system.

Tech Tip: If you are having trouble deciding which is the right driver, try the Driver Update Utility for Digital Research Technologies CMD PCI 646U2/648/649 Ultra DMA IDE Controller. It is a software utility which automatically finds and downloads the right driver.

Step 2 - Install Your Driver

Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them.

How to Open Device Manager

  • In Windows 11, Windows 10 & Windows 8.1, right-click the Start menu and select Device Manager

  • In Windows 8, swipe up from the bottom, or right-click anywhere on the desktop and choose "All Apps" -> swipe or scroll right and choose "Control Panel" (under Windows System section) -> Hardware and Sound -> Device Manager

  • In Windows 7, click Start -> Control Panel -> Hardware and Sound -> Device Manager

  • In Windows Vista, click Start -> Control Panel -> System and Maintenance -> Device Manager

  • In Windows XP, click Start -> Control Panel -> Performance and Maintenance -> System -> Hardware tab -> Device Manager button

How to Install a driver from Device Manager

  1. Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.

  2. Select the Driver tab.

  3. Click the Update Driver button and follow the instructions.

In most cases, you will need to reboot your computer in order for the driver update to take effect.

Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.

For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.

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