Upgrade my CPU or GPU?

[NerevarineX]

Hello people, apparently my PC is getting older, and i am curious if i should upgrade my CPU or GPU, Specs:
CPU:Core i5 750 2.67 GHz
MB:ASrock P55M Pro
GPU:GTX 660 Direct CU II OC Edition
RAM:8GB DDR3 1333 MHz
PSU: CoolerMaster rp-600-pcar
1920x1080 (i usually go down to 720p if games aren't performing well)
so the thing is,
should i upgrade my GPU to GTX 670 this December and i'll upgrade my CPU on 2015 June-July OR Should i upgrade my CPU to i5 2500/ i7 2600 (with MB ofcourse) and GPU on 2015 June-July?
which option will bring better performance? Or can you suggest something else?

 

[Gracodana]

cpu first then gpu i'd say the gpu is still fine for games today. Are you not able to get any newer parts because if so i'd get a 970 or 290 and a haswell archecture i5.

 

[voyboyfan]

GPU, games depend mostly on the GPU and your i5 will not bottleneck it.
I would suggest a R9 280 or X if you're on a budget.

 

[NerevarineX]

cpu first then gpu i'd say the gpu is still fine for games today. Are you not able to get any newer parts because if so i'd get a 970 or 290 and a haswell archecture i5.

GPU, games depend mostly on the GPU and your i5 will not bottleneck it.
I would suggest a R9 280 or X if you're on a budget.

i sure hope it doesn't bottleneck it, and i am not able to get the newer parts, for now.
GTX 670 and R9 280 prices are almost the same tho i do want physx so i'll go with a 670 at 900p, appreciate your answers. should my i5 last a year more (atleast 8 months).

 

[voyboyfan]

Physx has no effect on the game as almost no games utilize it.
Go for more power and buy a R9 280 if they cost the same, you'll thank me later.
Yes your CPU will be good for next 8 months.
Also your CPU overclocks like a champ, so even if you have some minor bottlenecks you can fix it by overclocking.
There are plenty of guides on how to overclock it on the Internet.