Hertz vs FPS vs Resolution vs Megapixels?

[MrPorter23]

What is the difference between hz, fps, res, and mp's? I always see recording options such as 720p @ 60fps or 1080p @ 30 fps. Also what does hertz and megapixels have to do with any of this

 

[ryguybuddy]

fps means frames per second, 30 is considered "playable" and 60fps is "smooth". Hz is the same as FPS, in a way, in how fast a monitor can refresh, directly impacting how many fps you can see. So if your outputting 120fps on a 60Hz monitor, it will look the same as 60hz. resolution is number of pixels, and it looks better the higher it is.

 

[basroil]

Hz = the actual MONITOR refresh rate, i.e. the rate that images show up on the monitor
FPS = the number of frames per second a game can place on an output buffer. The monitor reads from that output buffer at it's internal refresh rate. If your fps is v-synced, the game waits for that output buffer to be fully read before putting out the next frame, to avoid switching the image halfway though a scan
"Rez" is short for resolution, the number of pixels in each direction on the screen. Full HD has a resolution of 1920x1080 pixels
"MP" is simply the resolution multiplied out and expressed in terms of millions of pixels. Full HD is 1920x1080/1000000 MP, or roughly 2MP