Hey, so I have a Gigabyte GA-H61M-S2P which is 6 years old and still running fine with Intel(R) Core(TM) i5-3450 CPU @ 3.10GHz and 4GB of RAM(1600Mhz DDR3) on one slot and the other one being empty. Graphics Card NVIDIA GeForce GT 610 2GB. I want to upgrade it by getting new RAM upto 16 GB and graphics card. Looking to play games like PUBG and CSGO smoothly. Suggestions for graphics card and things I should note before going for the upgrade.