I started building PCs as a teenager, first one in 04. Minimum spec, but I remember a mentor of mine sprung for a 64mb graphics card. From what I remember back then building rigs was good cpu speed, enough ram and a gfx card with as much memory as you could afford. I lost touch with my understanding of hardware spec after cores and hyperthreading, I still have no idea wth a cuda core is.
Anyway, I'm in need of new cpu mb and ram. I don't need brand new top of the line. 3ghz or so, handles games and supports 8gb ram or more. I've been thinking of trying to find used PCs on eBay that have good spec, any advice on a cpu to keep an eye out for maybe something a few years old as much as 5 years would suit me fine.