I was recently told that Nvidia graphics card preforms better when used with a Intel processor than if it would be used with a AMD processor. Is this true? If this statement is true, is the performance difference so big that it is best to always use ATI graphics cards in COMPUTERS with AMD processor?

The reason I wonder this is that I am thinking of buying a better graphics card for my computer. The computer has a AMD processor and a ATI graphics card. I had in MIND to buy a card from Nvidia because I have had some TROUBLE with my present graphics card. But the statement above ha made me uncertain.I wouldn't put much credence in this statement...if it were true they would only be selling cards to 1/2 the market...
Sounds fishy to me.i would say dont go with a new Nvida Graphics card but instead go with a ATI Graphics Card, just to be safe....They are interchangeable. I had an nVidia in my AMD based system for quite some time and it worked wonderful i am planning on getting a new nVidia card to replace my current ATI. Anyone who says otherwise does not know what they are talking about.Whoever told you that is utterly wrong.
There are no two ways about it, that's complete rubbish.i have an thlon right now and i have an 8600 GT and have had absolutely no problem with any compatibility issues, actually no problems at all. Makes absolutely no difference what so ever. Get what you like.yes wat ever floats ur boat, and wat ever is more affordable to u.I am convinced.

Your replies makes it impossible for me to draw any other conclusion than there is no connection between the combination of CPU- and GPU-brand and performance.

This was exactly what I wanted to hear. Thank you all for the help.