The HD 4830 is much faster than the 8600GT it is also a newer card. As the HD4000 series was AMD's last generation of DX10 cards and the 8600GT was from Nvidia's first get DX10 which was released a bit before AMD's first DX10 cards.
The HD 4830 is much faster than the 8600GT it is also a newer card. As the HD4000 series was AMD's last generation of DX10 cards and the 8600GT was from Nvidia's first get DX10 which was released a bit before AMD's first DX10 cards.
The 4830 is the better of the two, not only is it a more recent card but performance wise it has double the memory available despite using slightly more power.