CPU VS GPU upgrade

Fleming_1

Reputable
Jan 17, 2016
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hello i got this idear that i want to upgrade my pc but i stand in a place where i dont know if it is a CPU or GPU upgrade that i need so now i am here
CPU: AMD FX8350
GPU: 2047MB NVIDIA GeForce GTX 960 (EVGA)

the CPU upgrade:

CPU: intel i7-6700K
motherboard: Z170A GAMING M5
RAM: 16 GB RAM DDR4

Total price: 645€EUR/505£GBP/738$USD

the GPU upgrade:
GF GTX 980TI GAMING 6G PCI-E

Total price: 698€EUR/547£GBP/799$USD
now what should i do ?