aye_ef :
Alessio749600 :
Do you mean can you have Nvidia and AMD in the same build or do you mean can you have a GTX 680 and a GTX 750 Ti in the same system for example?
Yes or in my case I have a r6670 and just bought the 7950..will they crossfire or should I not. If it does crossfire will the new card be constricted in any way?
If you'd just look at the chart, it will be clear. The answer is a resounding no, it will not crossfire. They have to be the same GPU to be able to crossfire, though cut down versions can work with non or differently cut down versions. 7950's and 7970's could Crossfire, but a 7850 could not crossfire with either. Since the r9 series has some rebadging, some of them can crossfire, just look at the chart given.