I had the NMI parity errors up the wazoo!!! And when playin a few games, there would be this white line at the bottom of the screen at all times. This all happended while i was using Dell Driver 84.69
I switched to a genuine Nvidia driver 84.63 and both issues have been resolved thank the lord.
In my case I experimented w/ the 84.63 driver for about a week, and afterwards I decided I would never use the stock dell drivers anymore becasue they were just a headache

However if all else fails for you Id see if they could get a replacement for you
Hope it helps
