Is it worth the upgrade?

Currently i'm on a very tight budget and I want to upgrade my CPU; The only thing I can afford for my socket(FM1) is an AMD A8-3870k and i'm using a dedicated GPU (GTX 650 ti OC 2gb). Is it worth the upgrade or should I save up some more and get something better?

What is your current CPU?

 

This is most likely your best bet until you respond with your specs.

http://pcpartpicker.com/part/amd-cpu-ad651kwngxbox

If you want to stay with f1 socket Athlon II X4 651K is your best bet.i would save up for a 6300 and a am3+ and that will be about $200