Gaming PC - Upgrade Priority/Advice

[cg007]

Looking to upgrade my existing PC instead of buying or building new. Looking for advice on prioritizing what order to upgrade in and what to upgrade to to get the best bang for my buck. No exact budget in mind as I plan to move one step at a time if possible. Current PC:

GIGABYTE GV-N770OC-4GD G-SYNC Support GeForce GTX 770 4GB 256-Bit GDDR5 PCI Express 3.0 HDCP Ready WindForce 3X ...

MSI Z87-G45 Gaming LGA 1150 Intel Z87 HDMI SATA 6Gb/s USB 3.0 ATX Pro Gaming with Killer Networking & Sound ...

SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC ...

Intel Core i7-4770K Haswell Quad-Core 3.5 GHz LGA 1150 84W BX80646I74770K Desktop Processor Intel HD Graphics

G.SKILL Ares Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-1600C9D-8GAO

 

[elbert]

Your video card is about equal to a 1050ti. You could get a 1060 6GB which is over 50% faster.
PCPartPicker part list / Price breakdown by merchant

Video Card: EVGA - GeForce GTX 1060 6GB 6GB GAMING Video Card ($269.98 @ Newegg)
Total: $269.98
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-28 22:16 EDT-0400

You could also pick up 16GB kit of RAM.
PCPartPicker part list / Price breakdown by merchant

Memory: G.Skill - Ripjaws X Series 16GB (2 x 8GB) DDR3-1866 Memory ($119.88 @ OutletPC)
Total: $119.88
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-28 22:22 EDT-0400