I had a bunch of problems with installing Ubuntu on this graphics card.
I finally managed to do it, but it took a roundabout solution to finally get it up and running (just managed to do so today). I was unable to get my 11.10 CD or my 12.04.1 CD to boot. What I ended up doing was installing 11.04 and upgrading it to 12.04.1. I ran into a few problems along the way. Since I have a dual boot with Windows 7, when I installed 11.04 it messed up grub. No big deal, I just popped in my 11.04 CD and re-installed grub.
Then I upgraded to 12.04.1. After this install Grub was messed up again, so I popped in my 12.10 CD (which for some reason boots, but the graphics drivers wont work on it) and again reinstalled grub. After I rebooted and chose Ubuntu in grub, I got a purple screen that would flash black. Again, this posed no trouble, I just restarted, entered recovery mode, enabled networking, opened the root prompt and ran
sudo apt-get install nvidia-current.
Hope this helps you, it took a lot of trial and error to get to this point.