Should i upgrade my PC or build a new one?

[Malys]

I need help deciding if to build new pc from scratch or upgrade my gpu. Here is my current parts.

CPU: i7-2600K 3.4GHz
GPU: AMD Radeon HD 6970
RAM: 8GB DDR3, 1600mhz, CL 9
Motherboard: ASUS S1155 Z68
Power Supply: Corsair TX 750W

This is a pc my friend built for me 4 years ago.
i'm thinking of upgrading the GPU to GTX 970. Specifically Gigabyte GTX 970 ITX OC, because of it's size, my case can only fit a maximum of 27cm long card, the current one is 27cm and very tight fit.

Is it worth it to upgrade, or should i just build a new pc? I think other parts are still fine, but i don't know too much about computer parts. Any help would be appreciated.

 

[TheFluffyDog]

your still good, a little OC on the CPU is all you need for a year or so, however new games running on DX 12 may present a different scenarios, but you'll have a 970 and you can just build the new pc around that later.