That is a lot of RAM. Only a quad-core processor, but I imagine should still be fine for general-purpose desktop use.
What would you want it to do? Honestly I would call that over-specced for something like a file server and would probably consume a lot of power if left on all the time. Maybe a media server which can use the discrete GPU for video encoding?





I would say at minimum it has to be something no longer commercially available, or if it is something which has been sold continuously for a long time, the “vintage” one may have some difference to the current revision. If I can go to the store or online and buy one brand new, I would say that it isn’t vintage.
I do not think that there is a flat age which could apply to all categories of electronics. For a smart phone or a gaming PC, something from the 2010s might be “vintage,” but for audio gear or other things, the bar for something to be “vintage” might be significantly older.
Edit: thinking about it more, perhaps a good definition might be something which is significantly different in some way to comparable items being sold today. If there is no difference in how it looks or functions to something new, then it’s just old, not vintage, but if there is some aspect of it which has since changed over the years, maybe that qualifies it as vintage.