All of these are currently running perfectly. I enjoy upgrading my old stuff.
Main system (2018): AMD 2700X
Old main system (2012): Intel i7 3820 now upgraded to Xeon e5-1680 v2
Old old main system (2007): Intel Core2Duo E6850 now upgraded to Core2Quad Q9650
Old old old main system (2006): AMD FX-57 now upgraded to AMD FX-60
Dell XPS 8100: Intel i7-870
Dell XPS 9100: Intel i7-930 now upgraded to i7-980X
Alternate system: Intel i7-6850K
Laptop: Intel i7-8750H
Main system using Intel Xeon E3-1230 v2. If you don't want to look it up, it's roughly equivalent to an i7-3770. Really should upgrade, but haven't had a compelling need yet, and the spare money keeps going to other things.
Home "server" using an FX 8320e.
Got a living room HTPC using the AMD AM1 quad core chip (can't remember the exact designation)
I've got a bunch of other low-end machines I keep around for whenever a bug hits me to try something that I don't want to mess up my main systems with.
Home Desktop: Intel I5-4670K @ 4.4 GHz
Workstation: Intel I3 something (on vacation so can't check right now and no I don't overclock the company's computer)
Laptop: Intel Pentium B960 @ 2.2GHz (Gateway bios is crap and lousy cooling so can't overclock it anyway)