![]() ![]() RefreshRate tells you how often the screen is updated. In ads for computer monitors you can sometimes see something called 'Horizontal Sweep Frequency'. The 'Refresh-rate'is measured in Hz (Herz) 1Hz=1 time/sec Which is basically all monitors that are not flat) Type of monitors that use 'Cathode ray Tube' (CRT) technology. (Bare in mind however that this only applies to the (For every 'refresh' the picure on your monitor is re-drawn)Ī refresh rate of 50 updates/second gives you a more 'flickery' display, and less is worse. It is quite simply the rate at which your screen is beingįor a stable, flicker-free picture, at least 70 refreshes/second are recomended. Most people (computer users) are familliar with the term 'refresh-rate'. play 3D games that useĪ lot of textures, you can calculate how much memory you have left for textures. Here below I've put together a table with all the most common resolutions and how much memory they require in their respective color depths.Īlternatively you could use this table to see how much memory the display requires from your total ammount of graphics memory. In real life though, other factors may me decisive such as your OS (Operating System). So if you happen to have only 1 Megabyte of graphic memory on your ancient GFX card, you should be able to display 800*600 in 16-bitīut not in 24-bit (16,8 million colors). every pixel uses 3 bytes which lead us to the conclusion The 24-bit display then, quite logically requries: 24bit/8bit=3bytes/pixel. Quite obviously, the 16-bit display requires twice as much memory as an 8-bit Now, if you wanted to have more colors, like 16-bit instead, how much memory would that require? Well, 16 bits means 2 bytes, since oneĨ00*600= 480000 pixels in 16 bit means 480000*2=960000 bytes. Simply speaking, a 800*600 display with 256 colors requires 480000 bytes of graphic memory. This means that the total memory usage is: 480000 (ammount of pixels) multiplied with 1 In the example earlier we had a total of 480000 pixels. On an 8-bit display (the 8 bits describe the color depth amount of colors) every pixel occupies 1 byte in the computers graphic memory. In the past e.g., there have been computers where one 'byte' was only 4 bits. This is something that is valid for computers nowdays. kilo bytes (kB), Mega bytes (MB) One byte= 8 bits. TrueColor).Ĭomputer memory is 'measured' in 'bytes'. HighColor) and 24/32-bit (16,8 million colors, a.k.a. On the computers in use now, there are usually 3 alternatives when it comes to colordepth. ![]() How much memory this resolution requires depends on the colordepth. The total ammount of pixels in this case is: 800 times 600 = 480000 The most common resolutions are 800*6*768.Ī resolution of 800*600 means that the viewable size is divided into 800 picture elements (picture elements=pix_els) horizontally and 600 pixels So, if you know how much graphic-memory you have in your computer, you can also calculate which resolutions/colordepths you should be able to display.įor non-professional users, the most common ammounts of graphic memory these days are between 8 & 64 MB. There is a simple relationship between the ammount of graphics memory and the maximum resolution/colordepth you can use. (Windows95 /NT: Start: Settings /ControlPanel /Display /Settings), (Amiga: System:Prefs /ScreenMode), (Mac: 'TheApple' /ControlPanels /Monitors) We will try to change that now! :)ĭifferent screen resolutions and colordepth can be adjusted on your computer, but how you do it depends on what computer you use Knowing anything about such basic concepts as 'screen resolution', 'colordepth' and 'graphic memory-usage'. 'Screen resolution' is not a strange concept, yet there is a surprising ammount of people out there sitting by their computers not ![]()
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