PCIExpress and PCI video card together

[Sebastian Haase <haase@msg.ucsf.edu>]

Hi,
On my Tyan  Thunder K8WE  (s2895) I have two nVidia gfx cards
1) PCI-Express nVidia 6800GT - works fine with nvidia driver (thanks for the 
help  from this list!)
2) PCI nVidia 5200FX  that I put in an PCI-X slot

Problem:
the second card doesn't show up at all !! (It works on windowsXP-64)

lspci -v shows the PCI-E card as
0000:02:00.0 VGA compatible controller: nVidia Corporation GeForce 7800 GT 
(rev a1) (prog-if 00 [VGA])
        Subsystem: nVidia Corporation: Unknown device 0301
but nothing else indicates another VGA compatible device.

Is the PCI-X slot supported in the "default" kernel ? I use a precompiled 
2.6.15 kernel.  I checked the /boot/config-2.6.15... file but didn't 
recognise anything useful ...

Thanks,
Sebastian Haase