Gateway MOBO wont recognize pci-e video card

Gateway GT5228 with onboard nvidia video (k2bc51 lf MOBO).  Trying to install ATI Radeon X700 PCI-E video card.  From device manager, I uninstalled the nvidia onboard drivers.  Powered off and unplugged machine.  Installed card.  Powered everything back up.  There is no video coming out of the card :-(.  There is video coming out of the onboard card, though!  There is NO bios menu on this gateway computer that will allow me to switch video cards.  Windows XP MCE does not see the new card.  It only sees the onboard nvidia card.  How can I get this new card to work?!?!  Thank you!
plove79Asked:
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wanndererCommented:
You need to disable the on board video card from the BIOS to make the other one work.  If gateway removed that BIOS option, that would really be the first time I see this.  

Check for something named "on board video controller [enable/disable]"

Gateway BIOS are a bit weird and name thing something differently than what we are used to
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wanndererCommented:
After a short research it seems there is indeed no BIOS driver ... I really hate Gateway ...

It seems that the computer should be able to detect the video card directly when the onboard drivers are uninstalled and the new card drivers are installed.  Most topics finished unanswered on how to solve the problem, but some were talking about resetting the bios helped the computer fund the card.
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BraidenGCommented:
If you can, restore the NVidia Drivers, install the card, but use the onboard graphics to boot into the machine. Once in, go to device manager, and under video adapters you should see your ATI card, and your onboard. Disable onboard, then shutdown. Switch monitor leads over to the card, turn on and it should work.
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nobusCommented:
you can also test your card on another PC
another thing : can you power supply handle the extra load ? calculate it here :
http://web.aanet.com.au/SnooP/psucalc.php
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plove79Author Commented:
Thank you folks!  Unfortunately, I've tried most of these things, and I am most certainly banging my head against a wall!  No BIOS settings (I've read about flashing the bios with FIC's software), I can't get the new Radeon card to show up in device manager at all (even after I reinstalled NVidia drivers).  Windows never says 'Found New Hardware' ... actually, it did ... after I uninstalled NVidia, and booted back up, it wanted to reinstall the onboard card!  It didn't even see my new card.

I love how Gateway advertises the fact that they have a PCI-Express slot ('so you can upgrade your graphics') ... meanwhile, it will never let you switch out of onboard graphics!

--- --- As for the power supply having enough power, I will have to look into that more.  Thank you for the heads up on that.  The fan on the new card did spin up, however.  That was a good sign, right?!  (Maybe I'll disable the fan on the card for a couple of minutes to see if it is in fact a 'lack of' power problem?

Once again, thank you for your assistance!  
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BraidenGCommented:
Possibly try installing Radeon Drivers from their site.
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nobusCommented:
no help from Gateway?  try contacting them
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plove79Author Commented:
Out of warranty -- so they wont talk to me!!
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plove79Author Commented:
The 'online chat' people say that it should recognize the new card automatically - and switch automatically (without changing ANY settings), but that is certainly not the case. :-(
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nobusCommented:
check on their site for a bios update
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YLCSCommented:
I had the same issue.  I did download and install the newest available BIOS from Gateway's website but I still have not options in the BIOS for video.  The odd thing in my case was that the card detected when it was first installed.  I installed the newest available drivers from Nvidia without issue and I hit reboot like I have done a hundred times.  On reboot I did not get any display from the card, I only got video from the onboard.  I went into device manager and the card wasn't listed, only the onboard 6100.  I scanned for new hardware but nothing came up.  I slapped a 450watt PS on it and had the same issue.  I pulled the card from the system and used it on another and it detected and installed without issue.  I tried another 8600gt and the same thing happened.  I tried an old 7600 and an even older 6200 and none of them are detected.  I would call it a bad slot if I hadn't seen so many others posting about the same issue.  The only thing I have not been able to try is a video card with it's own PCI-e power lead.  None of the cards I had around here had it.  They are all solely powered from the slot.  Post if anyone has had a resolution to the issue please.
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hate_gateway_biosCommented:
I have had the same issue.  I tried to upgrade to 9800 GT & 500W power supply.  I got nothing on the card despite trying everything previously stated.  The 9800 GT has the supplimental power, it makes no dif.  The only resolution I found was giving up and using upgrades to make a new build.  Good Luck.
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