Not really.. Maybe some movies and high rez pictures... My last card was a geforce 7600QX. It was slow as dirt.. If I was draging a window around, it would freeze frame and was really jerky..
Does nvidea make a dual head 1gb card that doesn't need extra power from the power supply?
I agree with magicbullet.
You mean a 7600gs or 7600gt?
Either way it shouldn't do that. It sounds to me like your problems were related to driver problems. I have a 6600GT that runs dual screens great in windows and linux.
I would put the 7600 back in if you still have it, use driver sweeper from Guru3d, and reinstall the latest drivers.
If you don't have your 7600, or it still doesn't work (could be a broken card?) then a GTS 250 would be a good choice.