Your CPU is a huge bottleneck no matter what you overclock it to. Frequency isn't the same across all CPUs. Its definatley time to get a new CPU. Intel currently makes the best desktop CPUs but if you wanna save money go am3+ and a fx cpu
What are you doing that makes you think you have a bottleneck?
If it is gaming, then, yes, I suspect the cpu.
Few games can use more than 2 or 3 of your 6 cores, and the core architecture is poor, perhaps 40% slower than equivalently clocked current intel cpu's.
To help clarify your CPU/GPU options, run these two tests:
a) Run your games, but lower your resolution and eye candy.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.
b) Limit your cpu, either by reducing the OC, or, in windows power management, limit the maximum cpu% to something like 70%.
This will simulate what a lack of cpu power will do.
Go to control panel/power options/change plan settings/change advanced power settings/processor power management/maximum processor state/
set to 70% and see how you do.
You could also experiment with removing one core in the bios. This will tell you how sensitive your games are to the benefits of many cores.
If your FPS drops significantly, it is an indicator that your cpu is the limiting factor, and a cpu upgrade is in order.
It is possible that both tests are positive, indicating that you have a well balanced system, and both cpu and gpu need to be upgraded to get better gaming FPS.
Another thing, 60gb is small for a ssd as your "C" drive. It fills up quickly. Once you get to 90% full, you will lose speed and longevity.