So a year or so ago I decided to build a PC, and went out and bought the PSU, case, and RAM. Little did I know was that I wouldnt be able to fund the rest of the PC until later. So I now have 8 GB of ddr3 RAM, and i was wondering if it would be worth it to just buy some new ddr4 RAM so that I wont be limited to last generation CPUs? Or would it be worth it to stick with this RAM, and just get last generation i5, or i7? I would also like to keep in mind the cost of the older motherboards, and the newer ones.