should I upgrade my RAM for GTA V?

[superhiperpolulo]

hello, I currently have a GA-B75M-D3H motherboard with 3 sticks of 2GB 1333 MHz RAM and an intel core i5-2300, I already decided to upgrade the PSU as I currently have a generic one and the graphics card from a gt 630 to a gtx 960 or 950, but I am not sure if I should upgrade my 3x2 GB RAM sticks to a single 8GB Kingston Hyperx Fury, specially for games such as gta v and maybe bf4

 

[howardp6]

The recommended high end requirement is 8 GB, the best would have been two 4 GB sticks would be the best.