Greeko85 :
Well your cpu is severely underpowered compared to your gpu. It is creating a significant bottleneck thats why you are seeing high cpu and low gpu usage.
He's absolutely right. The CPU is bottlenecking your high-end GPU.
If you're planning to upgrade to a R3, R5, R7. Keep in mind that you'll probably have to upgrade your motherboard and switch to DDR4 RAM. So you're probably stuck for a while.
What motherboard do you have right now? Maybe you could be very lucky.