How to choose a video card? What characteristics are important?

Question

Iron

Good day good people!
I had a question about choosing a suitable video card on the site.
I look at the minimum system requirements (for example):

GeForce GTX 680 Ti (2 GB graphics memory or more) or better

The question arises, how to find out which video card will be more powerful?
Will a higher series graphics card (eg Gegorce GT705) be more powerful than a GTX680 Ti?
And how to arrange the entire list of video cards in order of increasing power? (Preferably without a benchmark, of course).
Well, or what characteristics of video cards play a role in performance.
I would be grateful for any of your thoughts on this matter.

Answer 1

in the camp of the greens, it has long been customary that
1 digit is a series
2 series price segment
3 for beauty
n90-slice of two braked n80
n80 pre-top single-boiler - with the prefix tee or ultra, respectively, top
one, and, accordingly, the lower the number, the worse and cheaper, but without a detailed analysis You can't figure out the specifications there, there are often such funny facts that a fully hardware video decoder is only in the most miserable video of the generation.
when changing generations, the productivity arithmetic often looks like this
n90≈2*(n+1)70
n80≈(n+1)70
n70≈(n+1)60
calculations on paper show that the performance of the chip and the bandwidth of the bus, even any top-end 980ti, is barely enough to run 2 GB of textures with acceptable performance, the presence of more than 2-3 GB in video cards is due to two reasons 1) marketing 2) and cluttering up the video memory with unused data , it comes to the point that some games take out and put 4 GB, although they are not really used.