Because games are an interactive medium, in an action game, you’re basically responding to visual information on screen, making a judgment, and responding to it by performing input.

The more frames that happen per second, the more information you’re able to receive in the same amount of time, which is why frames are most important in driving games, fighting games, or twitch shooters. Things happen very fast in those games, so having less frames a second puts you at a small, but very real disadvantage.

The visual info on screen also represents your inputs since you control it. In an action game, higher FPS means you see your character responding to your inputs more quickly, which feels perceptibly better.

You can get used to 30 FPS just fine, but certain, mostly action, games are simply better with higher FPS, whether you’re the kind of person who cares or plays competitively or not. Believe it or not even going from 60 to 120 is still a noticeable change.

One part is that a higher frame rate has less latency. At 30fps, every frame comes in around 33ms. At 165fps, that delay is reduced to roughly 6ms.

The other simple answer is just the advantage of more visual data over time.

TLDR: I like it when the game’s motion is smooth

A simple website to show if it matters to you is this one (ideally check it on a screen with more than 60hz):

https://www.testufo.com/

Everyone’s perception is different, I’ve met someone who couldn’t tell the UFOs apart past 30 fps. They also didn’t like shooters/action games much, probably because following fast movements was difficult for them.

But I think the vast majority of people easily notice the difference between 30 and 60. And 60 to 120 should also be possible notice for most. As for me, I used to play Quake 3 a lot and back then that was played on 120 or even 240hz CRTs. The first flat screens with slow reaction times and 60hz max were quite a step down.

While I don’t really like linus tech tips, they did some nice testing on the topic and came to the conclusion that more fps is measurably better for shooters, even if the refresh rate can’t keep up.

Lots of good answers already, but I’d also add, if you have the opportunity to go to a computer store like a microcenter or anywhere they have gaming monitors on demo, try one out for a few minutes, run a first person game if you can (there’s plenty of basic demos of them on the internet through WebGL), or run testufo in a browser.

It’s really hard to imagine the smoothness without experiencing it, and it’s why a lot of people say once they experienced it, they can’t unsee it.

24 is all you need to create the illusion of motion, and the brain fill the gaps, but when you control the motion, especially with a high precision mouse, it really breaks the illusion. Your brain can’t fill the gaps anymore, the motion can go anywhere at any time extremely fast. Like, even just dragging windows around on the desktop you can feel the difference. I instantly know when my 144Hz monitor isn’t running at 144. It also becomes a matter of responsiveness as the others said.

High refresh rates are also more effective at higher resolutions, because at 30fps maybe the object will need to travel 100px per frame, but at 240fps, that same object will move 25px 4 times instead. It’s probably fine when you’re watching a TV somewhat far away, but when the monitor is 32 inches and 3 feet in front of you, you notice a lot more.

People look at games more intently because they are actively engaged in a world through the screen with a game. A movie is just being watched, not interacted with, so the brain naturally doesn’t need or look for as much fine detail.

Like consider how closely you would look at a flower if you’re just looking at it, versus how closely you would look at it if you were trying to trim one of its petals into a little smiley face with tiny scissors. You’re going to notice more of the flower when you’re trying to engage with it. Same thing for video games.

Tv and movies don’t look choppy because the shutter speed of the camera smooth out the movement with motion blur. Motion blur in games is instead just simulated and not as effective.

Also as someone else have said a game is interactive and input latency can be as high as 3 frames, which at 30fps would be 1/10s and can be perceived…

I think 30fps (25fps in PAL-land) became the standard because televisions were 30 FPS (NTSC) or 25 FPS (PAL) due to interlacing. While the screen redraw on a NTSC television is 60 per second, it’s done as two fields so you only get 30 actual frames per second. This was done so you could have a decent resolution (525 lines for NTSC or 625 lines for PAL) while maintaining reasonable RF bandwidth limits for the TV signal by sending a single frame as two fields, half of the picture in each field on alternate TV scanlines.

So you probably have a lot of industry inertia to deal with so 30 fps (or 25 fps where PAL was formerly the standard) ends up being the standard. And for video it’s good enough (although 60fps/50fps is still better - until fairly recently, this would entail too much bandwidth so sticking with the old NTSC or PAL frame rates made sense).

But for computers no one really used interlaced displays because they are awful for displaying the kind of things computers usually show (the flicker is terrible with a static image in an interlaced screen mode. While it’s true there were some interlace modes, nearly everyone tried to avoid them. The resolution increase wasn’t worth the god-awful flicker). So you always had 60 Hz progressive scan on the old computer CRTs (or in the case of original VGA, IIRC it was 70 Hz). To avoid tearing, any animated content on a PC would use the vsync to stay synchronized with the CRT and this is easiest to do at the exact frequency of the CRT and provided very smooth animation, especially in fast moving scenes. Even the old 8-bit systems would run at 60 (NTSC) or 50 (PAL) FPS (although 1980s 8-bit systems were generally not doing full screen animation, usually it was just animating parts of the screen).

So a game should always be able to hit at least 60 frames per second. If the computer or GPU is not powerful enough and the frame rate falls below 60 fps, the game can no longer use the vsync to stay synchronized with the monitor’s refresh, and you get judder and tearing.

Virtual reality often demands more (I think the original Oculus Rift requires 90 fps) and has various tricks to ensure the video is always generated at 90 fps, and if the game can’t keep up, frames get interpolated (see “asynchronous space warp”) although if you’re using VR if you can’t hit the native frame rate, it’s generally awful having to rely on asynchronous space warp which inevitably ends up distorting some of the grpahics and adding some pretty ugly artifacts.

It’s mostly noticeable when you play fast paced games where you might for example turn your field of view 180 degrees in a fracture of a second to look behind you, or when you’re for example being chased or moving into hostile territory you will do a lot of rapid camera movement to keep a look out. With low fps, the screen turns into a blurry mess during those moments, preventing you from keeping your eyes on important visual information and requiring you to get your bearings again each time you stop to look at something. The higher the fps is the more snappy and crisp are these situations and the easier it is to keep your eyes on something during movement or to execute a precise maneuver.

Granted, for slower paced games a lower fps max be just fine, but anything hectic will be less enjoyable.

Try gaming on 30hz, then 60hz, then 120+ if you can and you will notice a dramatic difference

In a film or TV show response time doesn’t matter, and you don’t really need to see things that only pop up for a split second, in a game having a higher refresh rate can mean the difference between noticing an enemy and not

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This website demonstrates the difference between different fps rates. In comparison, you can immediately see the stuttering of image refreshes in lower resolutions.

• https://testufo.com/
• https://testufo.com/framerates-versus
• https://testufo.com/framerates-text

You may not notice 30 fps being choppy because of no or less grand movements, and because of no direct comparison.

One thing is looks, the other thing is that input and processing may be tied to the FPS cycle. This means that games that run at e.g. 20fps could get an almost 50ms frame’s worth of delay on any of your input, and game logic may also be limited to “inbetween” frames. At 20fps that’s 50ms, at 60 it’s less than 17ms.

It looks more fluid and pleasing to the eye

You can achieve the appearance of motion at lower frame rates, but when things are moving quickly the distance they move between frames can get quite high. You can cover this up with motion blur effects but it’s just not quite the same, and not so easy a process as when you are capturing real video.

Think of the difference between when a camera does a fast pan and when you turn your head quickly. I think if you really focus in on what you are seeing you will be able to notice some difference.

There is also a bit of that audiophile effect where lo-fi is good enough until you have got used to something better.

It comes directly from television. Early home PCs used televisions for displays, and by the 1980s TVs were generally capable of 60 fps (or 50 for regions that used PAL) so that’s what the computers generated. Everyone got used to it. And of course like everyone else said you don’t want to be adding more latency in games by not keeping up with that basic standard.