7850 or 7870

ok i have an FX 4100 CPU, i am aware that im on borderline of bottle necking! so whats the best? i am 14 yeas ols so budget is tight!

7870 dude fx 4100 is still a rated CPU but the 7850 oc like a beast so its really up to how much you want to spend 

you cant really bottleneck a GPU with any quad core CPU, especially a FX-4100

 

thanks guys