Can we use nVidia 8 and 9 series display cards for BlackMagic, because Zoom does'nt work ?
 nVidia 8000 and 9000 series are very much recommended because it gives sharp and rich colors on TV Out.
We have our own BlackMagic nVidia setting window where you can Zoom the TV out to avoid Black Bars.

And 7000 (7300/7600/7900/7950) series and nVidia Quadra FX-1500 (128) are also recommended.

nVidia Quadro FX-1500 is well tested and it gives wonderful video quality on TV

BlackMagic Digital Media Pvt Ltd.