Then it is not Apple ROM card.
It may and could work but not have early boot screen.
The only driver you need is for CUDA.
What driver did you dl? links are always more help than "got it from x".
This is the most helpful thread on the GTX support
Hello thanks for your reply
I used the nvidia drivers from this link
the point is that the card works on snow leopard, I got it to boot and evertying seemed fine, then installed lion and the mac got frozen after a while.
I installed the drivers for the card and also the cuda driver from nvidia.
Why would it work on snow leopard but not on lion?