Hi So I just saw a youtube video stating he uses an ATI 5870 for his graphics and alongside that an Nvidia GTX 275 for physics. http://www.youtube.com/watch?v=4FL1bzu_Zys&annotation_id=annotation_487286&feature=iv I am slightly confused. Would he be running these separately for different uses or is it possible to have them run side by side to improve performance? First time I have heard or seen of anything like this. Would appreciate any info. Thanks.