NVidia 7800 GTX PCIe works some of the time

I installed my NVidia 7800 GTX PCIe in my dx5150 MT, after upgrading
my power supply to 550W. The video card is connected to the PS as
well. I have "PCIe" selected in the BIOS as the preferred video.

About half the time I boot, the NVidia card works and I can use my
dual DVI monitors just fine. Other times, the card is not recognized
at all and I have to flip the DVI cable back to the onboard ATI DVI
output.

When the card is not detected, Windows Device Manager shows nothing
except the ATI adapter.

What else can I try to get my NVidia card to work reliably as my
primary adapter?

Thanks,
Mark

Step one: Pull the card and check the contact edge. Clean carefully with as
pencil eraser if necessary. Then reseat the card in the slot several times
to be sure it is fully seated.
Sometimes an expansion card can look seated at first but not be fully.

HH

"Mark A. Richman" <markarichman@gmail.com> wrote in message
news:349a0479-d173-481b-90e0-714cd3327d62@p25g2000hsf.googlegroups.com...
> I installed my NVidia 7800 GTX PCIe in my dx5150 MT, after upgrading
> my power supply to 550W. The video card is connected to the PS as
> well. I have "PCIe" selected in the BIOS as the preferred video.
>
> About half the time I boot, the NVidia card works and I can use my
> dual DVI monitors just fine. Other times, the card is not recognized
> at all and I have to flip the DVI cable back to the onboard ATI DVI
> output.
>
> When the card is not detected, Windows Device Manager shows nothing
> except the ATI adapter.
>
> What else can I try to get my NVidia card to work reliably as my
> primary adapter?
>
> Thanks,
> Mark

Is your power supply SLI ready or are you using the power adapters
that came with the card? Check to see that the power supply is feeding
the card with power by trying another power supply or at least try a
different power plug than the one your using. As said above make sure
your card is seated correctly too.

On Mar 11, 9:18 am, utah...@gmail.com wrote:
> Is your power supply SLI ready or are you using the power adapters
> that came with the card? Check to see that the power supply is feeding
> the card with power by trying another power supply or at least try a
> different power plug than the one your using. As said above make sure
> your card is seated correctly too.

Is it possible the Nvidia card is not playing nice with the onboard
ATI chipset? Might I have to swap it out for a Radeon?