Changing existing parts

[Piku112]

Hello guys, i had my pc for like 3 years now and its not good for the upcoming games
My build in 2013 was
CPU:Fx 8320 (overclocked to 4.4ghz)
GPU:Asus Gtx 770 2gb edition
Motherboard:Gigabyte GA-990FX UD3
Ram:4 x 2 = 8gb 1600 mhz
Aftermarket cooler: hyperx 212

The reason for build is solely for gaming only
i play Newly launched games as well as csgo (pretty much)
My monitor resolution is 1080p.

Suggestions Required for what parts shall i change for atleast 2-3 years future proof build
My budget can be extended to a maximum of 1000$.(60,000 INR)

I m from india, so if you could just please help me with parts,you could take reference from www.amazon.in (for my better understanding)

 

[Aeacus]

If you want to play @ 1080p and get solid 60 FPS, you need a better GPU. In your case, a GTX 1060 6GB.
amazon 1: http://www.amazon.in/PNY-GeForce-1060-Video-Graphics/dp/B01L9K8X26
amazon 2: http://www.amazon.in/dp/B01JNUO6BG/ref=twister_B01LZISEBG
amazon 3: http://www.amazon.in/GeForce-Dual-Fan-Gaming-Graphics-DUAL-GTX1060-O6G/dp/B01JHQT1SE

If your new GPU is bottlenecking your old FX-8320 CPU then you're looking completely new build (new CPU, MoBo and RAM) since AMD's AM3+ socket has 0 upgrade paths.
Only CPU upgrade you're looking at would be getting FX-8350 that is only 10% better than your current CPU. In my opinion, that's not worth the money.
With new CPU, MoBo and RAM, for medium-end, you're looking i5-6500 (36% better than your current CPU), LGA1151 socket MoBo and DDR4 RAM that runs at 2133 Mhz.

But first, go with new GPU and look how your PC performs. If it doesn't cut for it, get new CPU, MoBo and RAM while keeping your GTX 1060 6GB.

If you want to get medium-end PC according to the today's standards then you can look towards my Haswell build with DDR3 RAM. For high-end build, look towards my Skylake with DDR4. Both PC full specs are seen from my signature.