Good AMD cpu to replace Phenom ii x4 955BE

jamesg2571

Honorable
Apr 6, 2012
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I recently upgraded my GPU from a GT430 to a ATI HD ASUS 7850 2GB and I think ive got a bottleneck in my system

Phenom ii X4 955BE @3.5Ghz
12Gb Vengeance 1600 Ram
ASUS 7850 2GB
600w novatech PSU

i wanted to ask would it be better to upgrade to either a Phenon ii X6 1090t or a Buldozer 8core??

any help would be good, thanks! :)