Do i really need to upgrade my gpu?

[panoverclockers]

Hi to all. I have few questions:
I play games only on 1920x1080 resolution.
A) Do i really need to upgrade  my GPU?  gtx 780 to gtx 1070
B) If i upgrade  from gtx 780 to gtx 1070 do i will notice any difference on my gaming?
C) Is my  i5-4670K a bottleneck for 1070?
My CPU is:
 i5-4670K not overclocked  http://ark.intel.com/products/75048/Intel-Core-i5-4670K-Processor-6M-Cache-up-to-3_80-GHz
My GPU is:
 GTX780-DC2OC-3GD5 DirectCU II Overclock Edition http://www.asus.com/Graphics-Cards/GTX780DC2OC3GD5/
My MONITOR is:
 T.V. SONY KDL-55W829B https://www.sony.co.uk/support/en/product/KDL-55W829B
My games list is: Far Cry Primal, Resident Evil 7 Biohazard, Rise of the tomb raider, Diablo 3, Grim Dawn.
OS: Windows 10 pro 64bit.
-----------------------------------
My Full PC Specs
Case: Corsair 730T  http://www.corsair.com/en/graphite-series-730t-full-tower-case
PSU: EVGA SuperNOVA 1000 P2 http://www.evga.com/Products/Product.aspx?pn=220-P2-1000-XR
Motherboard: GA-Z97X-Gaming 5  http://www.gigabyte.com/products/product-page.aspx?pid=4953#ov
CPU: i5-4670K  http://ark.intel.com/products/75048/Intel-Core-i5-4670K-Processor-6M-Cache-up-to-3_80-GHz
CPU Cooling: CORSAIR HYDRO SERIES H90 140MM HIGH PERFORMANCE LIQUID CPU COOLER with NOCTUA NF-A14 INDUSTRIALPPC-3000 PWM http://www.corsair.com/en-us/hydro-series-h90-140mm-high-performance-liquid-cpu-cooler
NOCTUA NF-A14 INDUSTRIALPPC-3000 PWM http://www.noctua.at/main.php?show=productview&products_id=84&lng=en
MEMORY RAM: 16GB RAM CORSAIR CMY8GX3M2A1866C9 VENGEANCE PRO 8GB (2X4GB) DDR3 1866MHZ C9 DUAL CHANNEL KIT X2 -4x4=16GB  http://www.corsair.com/en-us/vengeance-pro-series-8gb-2-x-4gb-ddr3-dram-1866mhz-c9-memory-kit-cmy8gx3m2a1866c9
GPU: GTX780-DC2OC-3GD5 DirectCU II Overclock Edition http://www.asus.com/Graphics-Cards/GTX780DC2OC3GD5/
SSD: C:\ Samsung ssd 850 pro 256gb SATA3  http://www.samsung.com/us/computing/memory-storage/solid-state-drives/ssd-850-pro-2-5-sata-iii-256gb-mz-7ke256bw/
Storage: D:\ WDC WD5003AZEX-00MK2A0
Storage: E:\ WDC WD5003AZEX-00MK2A0
MONITOR T.V. SONY KDL-55W829B https://www.sony.co.uk/support/en/product/KDL-55W829B
MOUSE: NAGA EPIC CHROMA https://www.razerzone.com/gaming-mice/razer-naga-epic-chroma
OS: Windows 10 Pro 64Bit.
And few other stuff: few extra high quality fans and filters for the best\max pc cooling and clean pc.
 

[Crow47]

In the order you asked:

 

A) Maybe

B) Yes

C) No

 

I owned two 780's a couple years ago (first just one, then a second for SLI), and I was fairly exasperated with how quickly they became obsolete from a high-performance perspective. For me, the 3GB VRAM was absolutely crippling as soon as a game started to exceed that. If you don't care about textures, then you can probably get away with the 780. I have a Strix 1070 now, though, and I'm very happy with it. You have a 4K TV, if you have the itch to upgrade, you may as well get a new GPU and get the most out of your setup. Your i5 is perfectly sufficient for powering a 1070, even a 1080, even SLI of both. 

[Fight Game]

You are really the best person to answer these questions!  Because it depends on what games you are playing and if, in your own opinion, they are lagging or not.  That cpu should not bottleneck though.

[ir_cow]

Also to answer your questions in order

 

A) Depends on what your looking for settings wise and FPS. More VRAM will allow for high resolution textures. 3GB is getting close to the minimum for 2017 games on ultra settings.

 

B) It will double you FPS. I went from a 780 Ti overclocked and saw double the FPS in games I play like BF4.

 

C: Doubtful. The impact may be 1-3FPS on some games.

[potatochobit]

well, you didnt say why you want to upgrade your GPU?

 

780 is fine, but it is outdated.

and new AMD graphic cards are coming out some time between april-june.

now is a bad time to upgrade.

I would wait till the summer and get a 200$ graphic card which will give you a noticeable boost in power. 

[panoverclockers]

Thank you all!

[xenkw0n]

Yea I would definitely wait.  For 1080p I would just tweak the settings a bit in some games if you aren't getting consistent 60+ fps.  The next round of graphics cards from AMD and NVidia should start sporting HBM2 memory from what I hear and that should help provide massive boosts for a number of reasons.