There are a couple of "moving parts" in the considerations regarding displays (monitors) and video cards.  First is your viewing distance.  Based on that, the optimal size of the display is readily determined.  As an example, I am comfortable working 42-inches away from my 55-inch diagonal display that sits behind my mixer.   At my other working position, I'm comfortable 30-inches away from 34-inches away from my 32-inch display. Both are at 4k (3840x2160). The top 25-percent of the 55
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