Usually it is recommended to upgrade the GPU when it is being used 100% for a performance boost, but if you feel that the FPS you get in PUBG right now is good enough, upgrade the processor. If you want more FPS, only then upgrade the GPU.Im running an old 4th generation core i3 processor with its intel hd4400 graphics to play pubg mobile which kinda lags so since i can't afford new generation high end components i want to upgrade either my processor to used 4th gen i7 or get a graphics card.. I'm confused help me to chose what should i buy?