Do I really need a new cpu?

hi this is my first post on the site and I wanted to ask a legitimate question, do I need a new cpu?

my specs are as follow

cpu:amd phenom 2 x4 965 @ 3.7

motherboard: 970A-g46 by msi

ram :8 gigs corsair vengeance( i don't know the frequency but it is around 1.6 GHz)

gpu: X2 XFX HD 7770 @1.095ghz (crossfire is on)

psu is a 630 wat psu


I just wanted to know if I should upgrade soon because I am noticing performance is a lot lower than many people who test games and get much higher frame rates using two cards and I wanted to know if I am bottle necking my system.

Your CPU is fine. I have the 955 Black edition. Runs pretty decent for my live streams execpt for skyrim X_X