Dont recognize the 295GTX

Linux: CENTOS 5.4
CUDA: 2.3
driver: 190.18…

I have two cards: Geforce8400
295GTX

Linux only recognizes the Geforce8400.

What can be the problem?

Thanks
Amir

Are the GTX 295 power connectors properly attached?

What happens if you remove the 8400?

When you say “not recognized” do your refer to CUDA DeviceQuery or to XOrg not using the card? (xorg might require a BusID specifier in the device section to control the GTX 295)