Expert upgrade advice needed

Madhatter4

Distinguished
Oct 2, 2005
220
0
18,680
I would like to upgrade my PC but Im not sure which component I should buy. This pc is used for gaming. Either I want a large 4K high performance G Sync monitor or a high end Nvidia Graphics card. Here are my current system specs and thanks for the help

Operating System
Windows 10 Pro 64-bit
CPU
Intel Core i5 4690K @ 3.50GHz 40 °C
Haswell 22nm Technology
RAM
16.0GB Dual-Channel DDR3 @ 1066MHz (11-11-11-27)
Motherboard
ASUSTeK COMPUTER INC. Z97-P (SOCKET 1150) 39 °C
Graphics
Acer K272HUL (2560x1440@59Hz)
4095MB NVIDIA GeForce GTX 970 (ZOTAC International) 29 °C
Storage
465GB Samsung SSD 840 EVO 500GB (SSD) 31 °C
Optical Drives
HL-DT-ST BDDVDRW UH12NS30
Audio
Realtek High Definition Audio