this is a 32-inch 4k monitor from benq. it costs $800. and this is a 40-inch 4k tv from vizio andit costs $400. as 4k tvs continue to become cheaper and cheaperit seems like the obvious thing to do is to just buy a new tv to replace your computermonitor. and technically that would work but thereare hidden details in the tv specifications that can make for an inferior monitor experience. hi i’m david and this why you probably shouldn’tuse a 4k tv as your main computer monitor. so why are computer monitors and tvs so different?

isn’t a display just a display? well to understand why computer monitors andtvs and different let’s first think about the difference in use case between them. first a tv. in the typical scenario for a tv, you’rewatching netflixs, ota tv, blu-rays and maybe playing on a gaming console all while sittingcomfortably on your sofa. on a computer monitor you could still be watchingnetflix or playing on a console, but you’re also browsing the web, typing a word documentand playing computer games with your mouse and keyboard up close and personal.

when you break it down into these use casesyou can start highlighting the priorities and understand why computer monitors and tvsare often designed so differently. since tvs are typically used for media consumption,the priorities shift towards features that improve immersion. make the screen bigger, increase the resolution,more vivid colors, or even hdr. and don’t forget multiple hdmi connectionsand a built in tv tuner for connecting all your media sources. while these are all things we’d also wantin a computer monitor, it’s also important to us to have clear readable text on screenand low input lag for responsive mouse and

keyboard operation. so back to our example of our $400 vizio 4ktv, one of the main problems is that over hdmi it only supports 4k @ chroma 4:2:0 ifyou don’t know what that means you can click on this other video that goes into more detailbut in short it means due to color compression finer details like text can be lost in transmission. this isn’t a big deal when you’re watchingmovies or tv because you’ll never notice details this small, but when you’re on thecomputer browsing webpages and word documents, artifacts from static single pixels can bedownright annoying. although you can find tvs that support 4k4:4:4 so no color compression such as this

lg uh6100. but then comes the next problem to consider. input lag. using 4k at 4:4:4 you get an input lag ofabout 73ms and this can be pretty noticeable during typical computer operation. again tvs can get away with this because watchingvideos is a passive experience and while you can argue console gamers will care about inputlag, tvs will often have game modes that will drop the resolution or switch back to colorcompressed signal to minimize the input lag which basically brings us back to our previousproblem.

so does that mean you should never use a tvas a pc monitor? of course not. some tvs will work perfectly fine as pc monitor. for example the sony x700d or the samsungku6300 both supports 4k 4:4:4 and have a reasonable input lag around 30ms (32ms/36ms). or if all you’re doing is watching youtubevideos or playing slow paced games, none of this probably matters to you. but for me chroma and input lag are just acouple of the many things i need to consider if i add a tv to my computer setup.

but i hope this helps you understand why tvsand a monitors are designed differently. hope you guys enjoyed this one. you know what to do and i’ll see you inthe next video.

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