it looks like the difference between 4600 and 4400 is in the execution units.
4600 has 20.
4400 has 16.
http://www.xbitlabs.com/articles/cpu/display/core-i3-4340-4330-4130_2.html
4600 has 20.
4400 has 16.
http://www.xbitlabs.com/articles/cpu/display/core-i3-4340-4330-4130_2.html
