Error allocating Mem BAR for PCI device / Error allocating I/O BAR for PCI device

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Error allocating Mem BAR for PCI device / Error allocating I/O BAR for PCI device

  • I just updated my GX280 to A06 and added an Opti OHCI usb 1 card to it because my keyboard stopped working in Linux. Now as soon as the BIOS POST screen clears I see:

    04/00/0: Error allocating Mem BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/01/0: Error allocating I/O BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/01/0: Error allocating I/O BAR for PCI device

    There's a PCI Express Radeon X300 in the x16 lane
    PCI slot one has an Adaptec FireWire card
    PCI slot two has the Opti 82C861 USB card

    What now?
  • Did anyone resolve this yet? I'm getting the same problem with DTV card that I put in my precision 690 desktop. I get Error allocating MEM Bar for PCI device. Windows sees that PCI card but I cannot load any drivers even when I know they are correct drivers.

    Please help!


  • obirt wrote:
    I just updated my GX280 to A06 and added an Opti OHCI usb 1 card to it because my keyboard stopped working in Linux. Now as soon as the BIOS POST screen clears I see:

    04/00/0: Error allocating Mem BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/01/0: Error allocating I/O BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/00/0: Error allocating Mem BAR for PCI device
    04/01/0: Error allocating I/O BAR for PCI device

    There's a PCI Express Radeon X300 in the x16 lane
    PCI slot one has an Adaptec FireWire card
    PCI slot two has the Opti 82C861 USB card

    What now?




    " 82C861 " Card is probably PCI 2.1 5V card.

    5V PCI is not supported anymore in any computer with GMA900 series chipset.

    Only 3.3V pci 2.3 cards are suppored.

    Thats not a negotiation. Thats final.

    Report Unresolved Customer Service Issues here:

    Dell - Unresolved Customer Service Issues

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  • Yes now that I look at it, it has a single rear notch, so it is a 5 volt card. You are correct about PCI v2.3 not supporting 5 volt only PCI cards. However, if that is the case, why isn't there a second notch on the PCI slots preventing me from inserting a single notched 5 volt only PCI card?

  • obirt wrote: Yes now that I look at it, it has a single rear notch, so it is a 5 volt card. You are correct about PCI v2.3 not supporting 5 volt only PCI cards. However, if that is the case, why isn't there a second notch on the PCI slots preventing me from inserting a single notched 5 volt only PCI card?

    There is a Second notch on PCI-X slots. The Keying for 32 bit 33mhz slots was not changed to reflect that. PCI 2.3 DROPS SUPPORT ALTOGETHER for cacheing and 5v signaling. UNIVERSAL PCI cards have 2 keyway slots so they work in newer machines and servers that have 64 bit 66/133mhz slots with 3.3v only signaling. If you dont like that you have to complain to the PCI SIG not dell. The slots are made to current Spec. Dell SHOULD post a FAQ though that explains and shows the PHYSICAL differences between PCI 2.0 and PCI 2.3 as well as NON SUPPORT for 5V cards in Newer systems.

    Its the same Game with AGP slots but AGP has been dropped.

    Original AGP cards were 3.3v AGP 1X/2X,  Then they became 1.5v 1X/2X/4X,  then .8v  8X

    Some motherboard makers didnt put a key in the slot so a 3.3v card would literally go into flame out mode and EAT the motherboard.  Some cards even though they should tolerate 1.5v AGP dont and so they too FRY your Dell with AGP forever.

    As CPU's and Chipsets voltages got lower and lower the rails driving the slots had to go down to keep up. Think about it CPU's went below 2.0 volts aka 1.4v tulatin and 1.3v Prescott Pentium4

    I think the barrier speed wise is that they cant make a .5v cpu because the signals on the board would be interfered with from noize from microwave ovens and hair dryers and perhaps other things.

     

     

    Message Edited by SpeedStep on 11-10-200612:16 PM

    Report Unresolved Customer Service Issues here:

    Dell - Unresolved Customer Service Issues

    I do not work for Dell. I too am a user.

    The forum is primarily user to user, with Dell employees moderating.