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Or better, use 3 4K screens :-) My record of the number of source files being opened concurrently was 10 when I was trying to understand a particularly nasty spaghetti code base.

Would you mind sharing the model? I tried using my Hisense but it wouldn't work. And I've read that TVs won't always work properly as monitors, but then obviously there's a much wider and cheaper choice of TV panels than dedicated monitors.

2x of these: Samsung UN40KU6290FXZA

You are aiming for something that supports both 4K (3840x2160) [or greater I suppose] and a 60Hz refresh rate in that mode. On cheaper models this can be found on a HDMI2.0 input. More expensive ones might have DisplayPort as an option.

Shop around during TV season and you can find a quality model for $200/ea.

Thanks! Next question is whether I need a new graphics card.

Isn't it annoying to keep moving your neck around than sticking to the main app window one at a time?