Choosing 4k monitors: IPS, 144Hz, HDR, 1ms response rate, curved, freesync - what do you REALLY need?

In terms of FS2020, which features are noticeable and which don’t matter that much? I do a lot of fast aerobatic flying in external view. Lot of gamer forums talk about 1ms response time and 144Hz being essential - but I’m not sure if this applies to FS2020?

Currently I use the Acer Nitro VG270UPbmiipx Quad HD 27" LCD, which is 1440p IPS, 144Hz, 1ms response time ‘gaming monitor’. However, I tested with my work monitor: a Thinkvision T27p-10 which is a 60Hz, 4k, 5ms response time, and honestly I couldn’t really see much difference beyond an expected drop in FPS due to going from 1440p to 4k. I had to take my work monitor back to the office though, so I’m in the market for a 27" 4k monitor for FS2020.

Side note:
My Acer monitor doesn’t play nice with my work macbook pro though - resolution/blurry text problems, I want to be sure I don’t have this problem with whatever 4k monitor I choose.

OMEN X Emperium 65 Specifications | HP® Official Site

I am using 4K at 60Hz and the sim runs fine. I have 2 addition 2K monitors I used to put the PFD and MFD on. I am not sure I can see much of a difference from 4K or 1440. I have the graphics on ultra and did not change the config file to try and get more. 4K makes a difference with the scenery I am using in P3D so I leave it at 4K even with MSFS 2020. If all runs well in 4K then it is still worth it, I am sure the graphics in MSFS 2020 will get better over time

My personal opinion is that response time and frequency are useless characteristics regarding FS. G-SYNC or Freesync are usefull only if your refresh rate can reach your lower monitor frequency. For example, if you can only reach 50fps and if your monitor only goes down to 60Hz, it’s useless.

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An IPS panel IMO is worth having, reproduction of colours and viewing angles are good.
A high refresh rate is not worth chasing if you are only going to use it fo flight sims, more beneficial to First person shooter games where you might actually achieve a high enough frame rate to utilise the screen refresh rate.
If you are only looking at 27” monitor I would be inclined to stick with a 2k (1440) screen, it is regarded as a good size/resolution combination- pixel density really. I think at that size for the difference in clarity you may see at 4K it might be better to save the processing power and aim for a better sim performance in terms of frame rate and smoothness. Or save money or sacrifice 4K in favour of other features.

Personally I would only consider the step to 4K if I were looking to get a 32” and above screen size, basically for the pixel density. Remember the clarity of a screen is more dependent on the pixel density and how close you are to the screen, than just a simple higher resolution must be better attitude.

Diminishing benefits of really high resolution (4K) screen the smaller the physical screen is (27” and below), but the larger you go 4K makes sense to achieve a higher pixel density that will become more apparent at larger screen sizes.

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