Upgrades for Athlon II X4 640

ubermonkey69

Honorable
Mar 27, 2012
1
0
10,510
i currently have an Athlon II X4 640 and i am wondering which of the following cpu's i should get?
that is what is in my budget range:
- Phenom II X4 980
- FX-6100
- FX-4170
- Phenom II X6 1045T

the rest of my specs are:
mobo:GIGABYTE GA-970A-UD3 AM3+
gpu:Radeon HD 6850
ram:8GB (4 x 2GB) DDR3 1333
power:650w
hdd: 1tb