Upgrade or Replace?

Dennis_65

Commendable
Oct 2, 2016
1
0
1,510
Asus P7P55 LX Mobo
Intel core I5 750 @ 2.67
8BG DDR3 1333

Good on graphics card got a 970 SSC, just worried about those three

Not having any performance issues to speak of, just thinking toward the future, system is getting old. My question is, at this point should I upgrade cpu and ram, keeping in mind cpu for the 1156 socket are getting harder to find and the upgrade would only be slight, but cheap. Upgrade the ram, I can go to 1600 or 2200. Or should I just say screw it and replace all three? Looking at the newer 170 chip set boards and and I5 6600 @ 3.90 with DDR4 2133, would this be a significant upgrade?