just uninstall all your ATI drivers first via add/remove programs and then you might even want to run the latest version of Driver Sweeper. Then shut down and switch cards. Boot up and install the newest Nvidia drivers.
I can't find ati/amd any thing under Add/remove programs. I guess I will have to remove them under c drive. P.S Can you just copy the ati drivers to usb drive or dwonload them from ati/amd as a back up?
P.S Can I just put the card in first and drivers and then kill the ati drivers or would that be bad.
You need to actually uninstall the AMD/ATI drivers, not just delete them from the C drive. You want to make the driver switch to the new card as "clean" as possible to avoid any conflicts.
If you absolutely cannot find the current AMD/ATI drivers in the Add/Remove Programs list, forget uninstalling the old drivers, shut down the PC, install the GTX 580, boot up. At boot up, it will say "found new hardware", ignore that, and proceed to install the new Nvidia drivers (double click on them). During the install process, there is an option to perform a Clean Install. Click on that and follow the prompts, then reboot again once the process is finished.
Will the 4870 still be able to do what it needs to do before I put the GTX 580 in.
Yes, it can run on the generic drivers that Windows uses. But typically, you would do it all in one sitting: uninstall the AMD/ATI drivers, shut off the PC, install the new GTX 580, boot up, install the new drivers you downloaded off the Nvidia website (Clean Install).
I have the GTX 580 up and running. I did not kill all the ati drivers and crysis is runing good maxed out, but there is some tearing. I used the disk, becuase my internet died for a bit. It does not seem as good as I would think for the "fastest GPU ever". I will try updating the drivers to see if that would help.