Videocard trouble

[GM.Casper]

My old videocard died and I got new one, but now Civ4 crashes often and Oblivion doesn’t work at all. The card should be powerful enough, so it must a compatibility issue. Can I fix this or should I get a different one?

My computer stats:
Windows Vista Ultimate 32bit
AMD Athlon 64x2 Dual Core processor 5600+ ~2,8 Ghz
2046 RAM
NVIDIA GeForce 9500 GT 1266 MB

Thanks in advance!

[factotum]

You installed the latest driver for the graphics card?

[GM.Casper]

I installed the latest nvidia driver. No improvement.

[Brother Oni]

Is the card properly pushed into the slot and do you have sufficient cooling on your system?

Are your motherboard drivers up to date as well?

[factotum]

Something else occurs to me: do you have SP1 for Vista installed? The released version of it had a problem whereby the graphics card memory got mapped twice into a process's address space, and with the amount of memory you've got on your graphics card, that could be causing big issues!