Yes, it does. It supports even 2048 x 1536@85Hz
Yes nvidia cards are support for NFS Hot Purist but some nvidia card are not supported minimum nvidia card are 7600gs..
Well, you can use a program called irotate if you have a monitor that supports a resolution of 1440x900 (in other words a 17" or 19" monitor) and choose to rotate it in irotate's settings or it is built in to your graphics driver as extra software such as an Intel 845GV/GL/GE chipset. Also it should be enabled on most recent NVIDIA Graphics Cards such as GeForce 8 series. For irotate: http://www.entechtaiwan.com/util/irotate.shtm
nVidia and ATi both support valve games.
You can download drivers for GeForce video cards for free from NVIDIA's support site.
Scalable Link Interface (SLI) - by Nvidia Crossfire - By ATI
Minimum = Nvidia gefore 6600 series
I would reccomend NVIDIA but they are very similar.
The only 3D accelerated (what I assume you mean by "functional") drivers for NVIDIA cards for Linux are for x86 and x86-64 computers. The only support for Nvidia cards elsewhere would be the nv driver (which is already included), and only supports 2D acceleration.
No, the graphics cards have to be the same model.
amd radeon is the best compare to nvidia
Drivers are files that help your computer understand how to use a part. Nvidia is a brand of Graphic cards. Updating your Nvidia drivers is important. www.Nvidia.com
nVidia GeForce cards are very much top of the line cards, as far as whether or not they are the best cards available depends on your requirements. nVidia is a great choice for Gaming, while ATI might be better for media work, such as video encoding.