GTX 470 Real Player issues?

[anroin]

I noticed that enlarging a video of Real Player format causes pixellation when using my GTX 470.This only happens by Real Player videos,when I open a video of another format there's no problem.I first thought it was a problem of the player,but when I installed it to another PC it works fine.So I tried changing back to ATI X1600 and the pixellation problems went away!
Is this a fault of my card,or does anyone else with a 470 have this issue?

 

[skolpo]

Could be funky drivers. Seeing that you put in an ATi card in to test it, that means you have the drivers also installed onto the system. This might cause a problem with the nVidia drivers. Try uninstalling the drivers and do a clean sweep of all drivers then reinstall the nvidia drivers.

 

[anroin]

Actually,I removed the Nvidia drivers first,than installed the ATI card and installed the ATI driver...So they were not installed both at a time.