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Refresh Rate vs. Frames Per Second

2015-12-02
hey gray here with science studio so what's the difference between FPS which stands for frames per second and refresh rate which is usually denoted by Hertz if you've been recently shopping for a new TV or new computer monitor you probably notice the specification denoted by Hertz usually 60 Hertz or 120 Hertz 240 Hertz even 480 Hertz in some cases but what does refresh rate have to do with the number of frames per second that the monitor displays well the answer is nothing at all in the case of a computer the graphics card or integrated graphics processor in some cases is typically the sole determinant of how many FPS you see on a monitor now what the monitors job is is to translate that data into a moving picture but this is where refresh rate comes into play basically the refresh rate of a monitor or television is the number of times that a signal can be transmitted to the screen per second so in a way refresh rate is a type of frame per second parameter but it has nothing to do with the number of frames per second that enter the screen from the source the computer DVD or blu-ray player or channel service provider so let's set up a hypothetical let's say I have a computer that's pushing about 30 frames per second from the computer to my monitor and my monitor happens to be a 60 Hertz monitor that's typical of most cheap displays so if my monitor is capable of refreshing its screen 60 times per second and my computer is only sending to 30 frames per second via DVI or HDMI cable then we're in the clear often times what happens is the monitor or TV will interpolate frames in between those that it's receiving from its source so if my 60 Hertz monitor is receiving 30 frames per second from my computer then it will interpolate in between each frame if the computer is sending 40 frames per second to my 60 Hertz monitor then my monitor might interpolate between every other set of frames rather than between every set of frames but then this raises the question what if my computer is sending more frames per second than the refresh rate of my monitor so let's say now that instead of 30 or 40 frames per second and my source is sending to my 60 Hertz monitor the source is sending 120 frames per second what will the monitor do there well there's actually not much it can do it's really only going to send out a true 60 frames per second because this is what the monitor is capable of now there are instances in which you can overclock to an extent the refresh rate of a monitor but you'll be lucky to get maybe 15 to 20 Hertz on top of what you're already rated at so if a source is sending 120 frames per second to your 60 Hertz TV or monitor chances are you aren't seeing the full picture the same case applies to a 240 frames per second source or anything above that so what's the sweet spot well obviously 60 Hertz is pretty common in fact most monitors and TVs that you'll find on Amazon Newegg and even in local stores happen to be 60 Hertz it's just cheaper this way and to tell you the truth the human eye can't discern much of a difference between 60 frames per second and 120 frames per second but this doesn't mean that you should just settle for 60 Hertz 120 Hertz is becoming more and more common if you shop for TVs over Black Friday or Cyber Monday you probably notice that be where fresh rates were directly correlated to the price tags of those televisions meaning that a TV with a higher refresh rate was likely more expensive than its a lower fresh rate counterpart if you have a newer TV with a 120 or 240 Hertz refresh rate you've probably noticed that when watching HD you'll say blu-ray movies subtle wobbles in the camera or the occasional sutter of something that you wouldn't have known in a sixty Hertz display these little micro jolts and micro anomalies are the result of a higher refresh rate so it's a higher refresh rate worth the extra money well that's up to you some people hate seeing those little micro anomalies and micro movements and the cameras it seemed less professional others like myself personally enjoy seeing things like that it makes the movie seem more realistic and not so artificial stable check out your local electronics store that sells TVs and even hatch them on display and decide for yourself whether you prefer something that seems more stable or arguably seems more realistic this assign studio thanks for learning you
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