Upgrade Question CPU/GPU

[blackout956]

Hey Guys,
since I'm not that much into hardware and benchmark stuff I'd just like to ask u a question.
I am about to upgrade either my CPU or my GPU. The question is, what will give me the better performance and improvements for my gaming experience.
My current System is:
Motherboard: Z87-G43 Gaming
CPU: Intel Core i5-4590 @3.30ghz
GPU: Geforce GTX 770
Ram: 16gb ddr3
and a 530 watt power adaptor.

So i want to upgrade either CPU to Intel core i7-4790k or GPU to Geforce GTX 970.

I'm super excited for your answers, have a good day!

[David (PassMark)]

Both the CPU and video card are already pretty reasonable. So don't be expecting a huge jump in performance from an upgrade.

But if you have money to spare, then I would do the video card first.