As far as FX, forget it, the Phenom II 965 is a much better choice at $85. It'll destory a 8120 or 6200 or 4170.
Read the first paragraph about the G630. The G850 I recommended is 200mhz faster.
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-2.html
No a dual core (w/o...