Nvidia driver 304.125 slow performance on Geforce 7050


I have Nvidia Geforce 7050 onboard graphics. I have installed 304.125 legacy drivers from Ubuntu repository. The problem is that the performance of the driver is slow and the display stutters. The animations of Unity take 1-2 seconds to load. Firefox shows screen tear and sometimes it flickers.
Sometimes on boot instead of showing the login screen it shows me a garbled screen and I have to switch to a TTY and switch back to X using Ctrl+Alt+F7 in order to get back to a proper login screen.
I also installed the Nvidia driver manually but the same effects are observed.
Please help.

nvidia-bug-report.log.gz (62.6 KB)