TechyInAZ :
Do you need to upgrade at this moment? Your GPU is quite weak compared to what the athlon 880k is usually paired up with, perhaps if you wait you can get more for your money...
What do you do with your PC? What games do you play?
Like today I was playing battlefield 4 on ultra (free trial for 7 days so why not) and I would get massive frame drops from 55fps to like 25 and it would shoot right back up again, this happened with all presets (ultra,high,med and low). And when I try to play another game called Insurgency (this game is known to be quite optimized) I get massive frame drops for no reason. Ive asked around and people are saying my cpu is too weak and that my graphics card should be able to handle these games without frame drops. Also graphics card and CPU always stay under 70 degrees celsius (GPU 45 degrees when gaming and CPU 60 degrees with stock cooler)