I'm not sure what to do. My current GPU is a gt 740, it can play alot of games on low settings. I have 8gb single channel of RAM 2133Mhz. The reason I'm asking is because GTA V is a game I like to play, but it isn't always the best. When I run the game, with nothing else open I can play for long times with no lag, however say if I have just a single program open, discord playing with my friends then it gets terrible. I have random lag spikes, like 0 fps just frozen there for long times. Although, when I use Afterburner then I can see my VRAM is filling up all the way when the lag spikes start, so I am super unsure whether a new GPU or more memory would fix this. Thanks.