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New mobo, can't enable DMA

By redrabbit79
May 29, 2008
  1. Hello all,

    Recently purchased new motherboard (ECS 755-a2). Installed, no probs there. Running XP Home. For the life of me can't get DMA enabled on primary channel. In BIOS, when I enable IDE DMA transfer access, computer acts like it can't find OS. When off computer runs, albeit in PIO mode for HD.

    ECS 755-a2 mainboard (SIS 755 chipset)
    160gb seagate HD
    HP DVDR/W drive
    512mb pc3200 DDR
    GF Fx5200 128mb GPU
    Athlon64 3200+ processor

    Really ticking me off, PIO is slow as snail snot! Thanks for the help!
     
  2. mailpup

    mailpup TS Special Forces Posts: 6,979   +362

    And we all know how slow that is. :) Go to the primary channel in the Device Manager and uninstall it. Reboot and Windows will automatically reinstall it. See if that changes it to DMA transfer mode.
     
  3. redrabbit79

    redrabbit79 TS Rookie Topic Starter

    thx for the reply. Wish it were that easy, tried that numerous times. Still no go. :(
     
  4. mailpup

    mailpup TS Special Forces Posts: 6,979   +362

    If you installed a new motherboard but used an old hard drive with Windows already installed, you should perform a repair or reinstall of Windows followed by installation of all applicable drivers.
     
  5. redrabbit79

    redrabbit79 TS Rookie Topic Starter

    done and done. Don't know why its not working. Was told that BIOS setting for DMA didnt really matter becuase DMA is managed by windows...not sure tho. Keep the replies coming! Thanks!
     
  6. mailpup

    mailpup TS Special Forces Posts: 6,979   +362

    What devices are installed on the primary IDE channel? Are the jumpers set correctly? You know, master - slave or both to cable select.
     
  7. redrabbit79

    redrabbit79 TS Rookie Topic Starter

    Hard drive on primary, alone, DVDRW on secondary, also alone. Switched HD to secondary, drive jumps right into udma5. Thinking primary ide channel failed on me. Computer won't boot with dvd hooked to primary, either, which could be understandable. Opinions before I send it back to ECS?
     
  8. mailpup

    mailpup TS Special Forces Posts: 6,979   +362

    You didn't say anything about the jumpers on the back of the devices. With each single device on a separate channel, set each to master.
     
  9. redrabbit79

    redrabbit79 TS Rookie Topic Starter

    Oh, sorry. No change with both set to slave.
     
  10. mailpup

    mailpup TS Special Forces Posts: 6,979   +362

    You missed my point. If there is only one device attached to each IDE controller, it should be set to master. If set to slave, it might not be recognized.
     
  11. redrabbit79

    redrabbit79 TS Rookie Topic Starter

    sorry, meant master, lol. Works on secondary, I just can't have DVD hooked up... :/
     
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