I have a m5a78L-M motherboard with a 6100 processor. I'm looking at upgrading the graphics card to either an r7 260x or gtx 750ti. My knowledge of pc's is very limited, could anyone advise me if I will need to replace the CPU at the same time to prevent a bottleneck? If so, what processor would you recommend please? I was thinking an amd 6300? My budget is limited. I'm not a big gamer, but upgrading my pc a little (because it probably needs it) and to play witcher 3 at some point (because it looks great) would be good.
Thank you for any help.