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PapaSmurffFlag for United States of America

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PCI Express in PCI Express 2.0 slot

OK, two questions.

1) Can a PCI Express video card work in an PCI Express 2.0 slot

2) (I just had to plug it in..) I'm getting an "00/1F/2" Error allocating upper memory block for PCI device" when I try and use the video card.

Dell says this, "bb/dd/f: Error allocating Upper Memory Block for PCI Device 

where bb is the bus number,dd is the device number, and f is the function number. All numbers are in hexadecimal 

The computer encountered a problem while trying to configure an expansion card or integrated LegacySelect device.
If the device number points to an expansion card, the card can be removed. If the device number points to an integrated device, disable the device in system setup."

So I'm thinking the card won't work in my new system..?
Please advice,
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DavidGonzalez

1) No, it's not possible
2) Because bus size is different
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Yes, a PCI Express card will work in a PCI Express v2.0 slot.    There's NO physical difference in the slots  --  the v2.0 spec simply doubles the bandwidth;  but 2.0 slots are fully backward compatible (as are v2.0 cards, which are required to work in a v1 slot).

So ... your problem is something else.    You may have a BIOS setting incorrect;  or you may not have the card properly seated [try removing it and carefully re-seating it ... being certain it's firmly in the slot].

What's the model number of the PC?  (You said it's a Dell, but not what model)
... and the make/model of the video card?
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ASKER

Well I guess I accepted the solution way to fast... Is there a way to recall the points? or should I start a new post?

Its a Dell Optiplex 780.
Card is ATI firewMV 2400
Thanks garycase!
Which version of the Optiplex 780 do you have?   [MidTower, Desktop, or Small Form Factor]

And do you have a display connected to the DisplayPort connector?    If so, disconnect it -- the tech reference clearly notes that the PCIe x16 slot is disabled if a display is connected to the DisplayPort.

Is your video card a PCIe x1 or an x16 card?


Optiplex 780 desktop, vga was unplugged when I test.

Video card specs:
 ATI FireMV" 2400 PCI Express Specifications

    * PCI Express® x1 architecture2
    * Powered by two of ATIs scalable FireMV workstation Graphics Processing Units (GPU)
    * 256MB DDR graphics memory1
    * Two VHDCI connectors
    * Low power consumption
    * Max analog resolution 2048x1536 per display
    * Max DVI resolution 1600x1200 per display
    * WHQL certification
    * RoHS and WEEE compliant
    * Full EMI
That's the card I assumed you had, but just wanted to be sure.

The desktop version doesn't have an x1 slot, but the x1 card SHOULD work just fine in the x16 slot.    You DID plug it in the PCIe slot (the x16 slot) -- NOT in one of the PCI slots ... right??
[I haven't tried it, but I suspect an x1 connector can be pushed into a PCI slot -- but this is clearly NOT a good idea :-)  -- and could cause electrical damage to the card, the slot, or both]

Have you reseated the card and confirmed it's tightly seated?    If so, go into the BIOS and see if there are any settings related to the video adapter -- you may have to disable the integrated adapter for it to properly use the card  (in most cases this isn't necessary, but in some cases it is).
hehe. No it wasn't a pci slot. I'm sure I would've fried the mobo or card if I did.

It's possible the card came a little loose when I plugged in the video adapter. I will re-check on Monday.. This is for my work desktop... wish it was my home machine. :)
I assumed as much -- just wanted to be sure.    Hopefully it will prove to be a simple case of a loose card (easy to do with an x1 card, especially if the bracket's not screwed in place.
I verified the card was seated properly and still got the error message above. I also changed the video to pull from the slot instead of on-board. Any thoughts?
Thanks,
Do you have any other cards installed?    If so, try removing them and/or moving them to a different slot.

... and is there a setting in the BIOS for "Plug 'n Play OS" ??  If so, be sure it's selected.
Removed firewire card and tried. Still a no go. Didn't notice Plug 'n Play feature in BIOS. System is noticing the vid card... just like liking it.

Papasmurff is sad.. :(
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Gary Case
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Sorry, it's a mini-tower. I can't seem to find the power supply on the system configuration page... why do they make it so difficult to read..?
I don't have a spare, however, I don't mind purchasing one if you think that's the case.
Last time I asked it was a Desktop :-)

In any event, the mini-tower has either a 255w or 305w supply ... still less than the specifications for the video card.    I do NOT think that's likely to be the problem ... but anytime you're running at below the suggested power, it's a possibility.    Never hurts to have a nice spare PSU around, however, so if you want to buy one to try that's your choice.    But first I'd be very sure there aren't any BIOS options you may have overlooked.


Roger that. I wasn't going to blame you if that didn't fix it. :)

I will check the bios again.

ps. yeah, its crazy.. I came in this morning and the spare desktop sitting next to my desktop is missing.. and now there's a mini-tower.. I think my desktop ate it.. survival of the fittest!