So basically those are the 4 things that should be compared?
The best comparison is just the framerate it can deliver at the most taxing games compared to other cards.
The 4 things i mentionned, are the biggest factors there.
often you'll come across cards with "lots of memory, high clockspeed", but not gddr5, it can become a bit confusing
Its about using alot of memory as fast as possible, and getting as much texture and pixels on the screen as possible
Therefore high memory, high memory bandwith, high texel and pixel rate.
Thing is, these are numbers in the millions. So its best to see it relative and compare the improvement between cards, or easyest, the resulting framerate.
And finally, when you can chose, go Radeon. Nvidea is equally fast, but lots more expensive.
The number of games that run better on Nvidea isnt that big. At least where the performance difference is worthwile
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Oh and one more thing. Take in accound the resolution the screen of the benchmark.
I for example got a tiny 19inch screen. barely 1440x900 resolution. But i challenge anyone to bring a game wich was made before 2014 that i cant play on full open graphics with shadows and reflections turned off.
just sayn.