Oldest PC is G31/Core2Duo from 2008, which is a family PC, this is about to be replaced with a used H87/Pentium Anniversary + SSD rig to give it a lift. There's also a P45/Q6600 rig that my son uses for homework/surfing which is going strong. 2nd family PC is H55/G6950 with a light OC - this may get an i5 750 + SSD for Christmas. My gaming rig is Z87/i3 and I see no need to move forward in chipset generation - an i5 K is next on the list. As has been said before, other than incremental generational speed bumps, motherboard/chipset changes are really only adding newer features like USB 3.1 and faster M.2. My M.2 is PCIe 1x bandwidth, so no gain on SATA other than size and losing 2 cables. I can see that PCIe 3.0 4x bandwidth on the latest gen stuff is going to be a benefit, but real world use may not see much change.